feat: implement user deletion via pullbasectl

Summary

Adds pullbasectl users delete — a CLI subcommand for deleting a user account.
This was previously noted in the documentation as a planned capability (the web UI and REST API already supported deletion; the CLI did not).

A companion docs PR will be opened at pullbase/docs that updates the CLI reference and workflow guide to reflect this change.

Changes

server/cmd/pullbasectl/users.go

• Added runUsersDelete — parses --user-id and --delete-acct-username flags, validates inputs, sends a DELETE /api/v1/users/{userID} request with the confirmation username in the request body, and prints a success message on receiving a 204 No Content response.

server/cmd/pullbasectl/root.go

• Added newUsersDeleteCommand() and registered it under the users subcommand group alongside the existing list and create commands.

server/cmd/pullbasectl/tokens_commands_test.go

• Added TestRunUsersDelete — spins up an httptest server, verifies the correct HTTP method, Authorization header, path value, and confirm_username body field, and asserts the success output.

Usage

pullbasectl users delete \
  --server-url http://localhost:8080 \
  --admin-token $ADMIN_JWT \
  --user-id 7 \
  --delete-acct-username "SomeAccount123"

Flags

Testing

cd server && go test -tags=test -count=1 -run TestRunUsersDelete ./cmd/pullbasectl/

All existing tests continue to pass:

cd server && go test -tags=test ./...

Summary by CodeRabbit

• New Features

  • Added a new users delete subcommand to the CLI that enables user account deletion with built-in confirmation validation and authentication checks.

• Tests

  • Added comprehensive test coverage for the delete user command, including API endpoint validation, authentication headers, and credential handling verification.