fix: repair native Windows paths and owner fixtures (#44)

* ci: run agent owner suite on Windows

* test: cover native Agent paths and correct Windows owner fixtures

* fix: normalize policy paths and Linux container mount targets

workflow-plugin-agent v0.12.8

feat: add generic provider compatibility (#39)

provider: list Bedrock models dynamically

provider: fetch ChatGPT models dynamically (#37)

* provider: fetch ChatGPT models dynamically

* provider: align ChatGPT model account headers

* provider: stop returning static model fallbacks

* provider: isolate model listing HTTP client

v0.12.3: OpenAI ChatGPT subscription provider

workflow-plugin-agent v0.12.2