Bump Go toolchain to go1.26.8 - #6476

## Release v1.15.0

### CLI

 * When `uv python install` fails, `databricks environments setup-local` now falls back to a compatible Python interpreter already installed on the machine. ([#6457](#6457))
 * Allow `databricks environments setup-local` to update `pyproject.toml` files containing TOML multi-line strings. ([#6445](#6445))

### Bundles

 * Before committing the automatic terraform→direct migration, run a deployment plan against the converted state; if the plan fails the migration is abandoned. ([#6486](#6486))
 * The `dbt-sql` bundle template now uses Databricks Runtime 16.4 LTS (up from 15.4 LTS) for classic (non-serverless) compute. ([#6418](#6418))
 * Fixed the direct engine silently ignoring edits to duration and timestamp fields, such as a Lakebase endpoint's `suspend_timeout_duration`. Such a change planned `0 to change` and was never applied. ([#6377](#6377))
 * Fixed `$${...}` not escaping a literal `${...}` on the direct engine, which failed with an `invalid dependency` error. ([#6484](#6484), [#6489](#6489))
 * direct: Fix deploying an update to `postgres_projects.default_endpoint_settings`. ([#6440](#6440))
 * direct: Fix deploying an update to `postgres_endpoints.settings.pg_settings`. ([#6441](#6441))
 * direct: Fix deploying an update to `expire_time`, `ttl` or `suspend_timeout_duration` on Lakebase resources. ([#6443](#6443))
 * Added PyDABs (Python) support for catalogs: `Resources.add_catalog` and the `catalog_mutator` decorator. ([#6408](#6408))
 * Bundle templates now use serverless [environment version 5](https://docs.databricks.com/aws/en/release-notes/serverless/environment-version/five), which offers better performance, and `databricks-connect` 16.4. ([#6378](#6378))
 * Fixed a job with a `table_update` trigger never converging on the direct engine. ([#6442](#6442))

### Dependency Updates

 * Bump Go toolchain to 1.26.8. ([#6476](#6476))

## Release v1.15.0

### CLI

 * When `uv python install` fails, `databricks environments setup-local` now falls back to a compatible Python interpreter already installed on the machine. ([#6457](#6457))
 * Allow `databricks environments setup-local` to update `pyproject.toml` files containing TOML multi-line strings. ([#6445](#6445))

### Bundles

 * Before committing the automatic terraform→direct migration, run a deployment plan against the converted state; if the plan fails the migration is abandoned. ([#6486](#6486))
 * The `dbt-sql` bundle template now uses Databricks Runtime 16.4 LTS (up from 15.4 LTS) for classic (non-serverless) compute. ([#6418](#6418))
 * Fixed the direct engine silently ignoring edits to duration and timestamp fields, such as a Lakebase endpoint's `suspend_timeout_duration`. Such a change planned `0 to change` and was never applied. ([#6377](#6377))
 * Fixed `$${...}` not escaping a literal `${...}` on the direct engine, which failed with an `invalid dependency` error. ([#6484](#6484), [#6489](#6489))
 * Remove forward_user_access_token from update_mask for Apps because it's not supported. Fixes regression in 1.14.1. ([#6510](#6510))
 * direct: Fix deploying an update to `postgres_projects.default_endpoint_settings`. ([#6440](#6440))
 * direct: Fix deploying an update to `postgres_endpoints.settings.pg_settings`. ([#6441](#6441))
 * direct: Fix deploying an update to `expire_time`, `ttl` or `suspend_timeout_duration` on Lakebase resources. ([#6443](#6443))
 * Added PyDABs (Python) support for catalogs: `Resources.add_catalog` and the `catalog_mutator` decorator. ([#6408](#6408))
 * Bundle templates now use serverless [environment version 5](https://docs.databricks.com/aws/en/release-notes/serverless/environment-version/five), which offers better performance, and `databricks-connect` 16.4. ([#6378](#6378))
 * Fixed a job with a `table_update` trigger never converging on the direct engine. ([#6442](#6442))

### Dependency Updates

 * Bump Go toolchain to 1.26.8. ([#6476](#6476))

Mirror the changelog fragment pattern from bump-go-toolchain.yml. The
workflow
now creates a `.nextchanges/dependency-updates/<pr-number>.md` fragment
after opening its PR.
Since the workflow uses a fixed branch (auto/bump-vuln-deps) that
re-runs daily,
guard the commit step to be idempotent when the fragment already exists.

Co-authored-by: Isaac <[email protected]>

See databricks#6476 for an example of the
same workflow step that's in place for bump-go-toolchain

Co-authored-by: Isaac <[email protected]>

Bump Go toolchain from `go1.26.7` to `go1.26.8`.

Release notes: https://go.dev/doc/devel/release#go1.26.8

---------

Co-authored-by: github-merge-queue <[email protected]>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

## Release v1.15.0

### CLI

 * When `uv python install` fails, `databricks environments setup-local` now falls back to a compatible Python interpreter already installed on the machine. ([#6457](#6457))
 * Allow `databricks environments setup-local` to update `pyproject.toml` files containing TOML multi-line strings. ([#6445](#6445))

### Bundles

 * Before committing the automatic terraform→direct migration, run a deployment plan against the converted state; if the plan fails the migration is abandoned. ([#6486](#6486))
 * The `dbt-sql` bundle template now uses Databricks Runtime 16.4 LTS (up from 15.4 LTS) for classic (non-serverless) compute. ([#6418](#6418))
 * Fixed the direct engine silently ignoring edits to duration and timestamp fields, such as a Lakebase endpoint's `suspend_timeout_duration`. Such a change planned `0 to change` and was never applied. ([#6377](#6377))
 * Fixed `$${...}` not escaping a literal `${...}` on the direct engine, which failed with an `invalid dependency` error. ([#6484](#6484), [#6489](#6489))
 * direct: Fix deploying an update to `postgres_projects.default_endpoint_settings`. ([#6440](#6440))
 * direct: Fix deploying an update to `postgres_endpoints.settings.pg_settings`. ([#6441](#6441))
 * direct: Fix deploying an update to `expire_time`, `ttl` or `suspend_timeout_duration` on Lakebase resources. ([#6443](#6443))
 * Added PyDABs (Python) support for catalogs: `Resources.add_catalog` and the `catalog_mutator` decorator. ([#6408](#6408))
 * Bundle templates now use serverless [environment version 5](https://docs.databricks.com/aws/en/release-notes/serverless/environment-version/five), which offers better performance, and `databricks-connect` 16.4. ([#6378](#6378))
 * Fixed a job with a `table_update` trigger never converging on the direct engine. ([#6442](#6442))

### Dependency Updates

 * Bump Go toolchain to 1.26.8. ([#6476](#6476))

## Release v1.15.0

### CLI

 * When `uv python install` fails, `databricks environments setup-local` now falls back to a compatible Python interpreter already installed on the machine. ([#6457](#6457))
 * Allow `databricks environments setup-local` to update `pyproject.toml` files containing TOML multi-line strings. ([#6445](#6445))

### Bundles

 * Before committing the automatic terraform→direct migration, run a deployment plan against the converted state; if the plan fails the migration is abandoned. ([#6486](#6486))
 * The `dbt-sql` bundle template now uses Databricks Runtime 16.4 LTS (up from 15.4 LTS) for classic (non-serverless) compute. ([#6418](#6418))
 * Fixed the direct engine silently ignoring edits to duration and timestamp fields, such as a Lakebase endpoint's `suspend_timeout_duration`. Such a change planned `0 to change` and was never applied. ([#6377](#6377))
 * Fixed `$${...}` not escaping a literal `${...}` on the direct engine, which failed with an `invalid dependency` error. ([#6484](#6484), [#6489](#6489))
 * Remove forward_user_access_token from update_mask for Apps because it's not supported. Fixes regression in 1.14.1. ([#6510](#6510))
 * direct: Fix deploying an update to `postgres_projects.default_endpoint_settings`. ([#6440](#6440))
 * direct: Fix deploying an update to `postgres_endpoints.settings.pg_settings`. ([#6441](#6441))
 * direct: Fix deploying an update to `expire_time`, `ttl` or `suspend_timeout_duration` on Lakebase resources. ([#6443](#6443))
 * Added PyDABs (Python) support for catalogs: `Resources.add_catalog` and the `catalog_mutator` decorator. ([#6408](#6408))
 * Bundle templates now use serverless [environment version 5](https://docs.databricks.com/aws/en/release-notes/serverless/environment-version/five), which offers better performance, and `databricks-connect` 16.4. ([#6378](#6378))
 * Fixed a job with a `table_update` trigger never converging on the direct engine. ([#6442](#6442))

### Dependency Updates

 * Bump Go toolchain to 1.26.8. ([#6476](#6476))

Mirror the changelog fragment pattern from bump-go-toolchain.yml. The
workflow
now creates a `.nextchanges/dependency-updates/<pr-number>.md` fragment
after opening its PR.
Since the workflow uses a fixed branch (auto/bump-vuln-deps) that
re-runs daily,
guard the commit step to be idempotent when the fragment already exists.

Co-authored-by: Isaac <[email protected]>

See #6476 for an example of the
same workflow step that's in place for bump-go-toolchain

Co-authored-by: Isaac <[email protected]>