scope worker image rebuild inputs

[pmbstyle]

Summary

• derive the worker-image fingerprint from the local import closure rooted at the worker entrypoint
• keep the Dockerfile, dependency metadata, lockfile, and worker prompt as explicit inputs
• fail closed to all Python source when the runtime import surface cannot be resolved or uses dynamic loading
• stop README and main-process-only routing, memory, Telegram, and prompt changes from invalidating the worker image

Container impact

• install locked dependencies without installing the project package
• continue loading project source through the existing /app/src runtime path
• remove README from the Docker build context contract

Validation

• 54 focused worker, image-contract, isolation, and restart tests
• full Python test suite (one expected Windows-only skip)
• Ruff, Black, MyPy, and diff checks
• Dockerfile build check
• disposable worker image build and import smoke completed during local validation

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 051a86e7-7d0b-4aac-871f-784de54575e4

📥 Commits

Reviewing files that changed from the base of the PR and between 2e0ac6d and 93849d1.

📒 Files selected for processing (4)

• docker/Dockerfile
• src/octopal/runtime/workers/launcher_factory.py
• tests/test_worker_image_contract.py
• tests/test_worker_launcher_factory.py

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