[hallvictoria]

Description

Fixes #1924

Fix Linux ARM64 payloads that contain generated protos but omit the worker implementation.

• Build and include the local worker wheel in both stable and RC packaging paths. Constrain packaged protobuf/gRPC versions to those used for proto generation.
• Replace duplicated packaging checks with a shared validator for legacy (3.10–3.12), proxy (3.13–3.14), and R2P2 (3.15+) payloads across Linux, macOS, and Windows.
• Check required modules, native binaries, and isolated worker/proto imports. Keep Linux ARM64 imports in a matching ARM64 container; validate R2P2 layout and executable architecture without running it.

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Pull Request Checklist

Host-Worker Contract

• Does this PR impact the host-worker contract (e.g., gRPC messages, shared interfaces)?
  • If yes, have the changes been applied to:
    • azure_functions_worker (Python <= 3.12)
    • proxy_worker (Python 3.13-3.14)
    • r2p2 (Python >= 3.15)
  • If no, please explain why: Packaging and artifact validation only; no protocol or shared-interface changes.

Worker Execution Logic

• Does this PR affect worker execution logic (e.g., function invocation, bindings, lifecycle)?

No. This restores packaged worker files and validates artifacts; invocation, bindings, and lifecycle code are unchanged. The execution-logic questions below are not applicable.

Python Version Coverage

• Does this change apply to all supported worker models?
• If yes, have the changes been made to:
  • azure_functions_worker (Python <= 3.12)
  • proxy_worker (Python 3.13-3.14)
  • r2p2 (Python >= 3.15)
  • runtimes/v1 / runtimes/v2 (Python >= 3.13)
• If no, please explain why: No execution-logic changes. Artifact validation covers all three worker families; the packaging repair applies to the legacy/proxy Linux ARM64 paths.

Programming Model Compatibility (proxy_worker and r2p2)

• Does this change apply to both:
  • V1 programming model (runtimes/v1)?
  • V2 programming model (runtimes/v2)?
• Explanation (if limited to one model): No programming-model-specific changes. Both runtime packages are included in proxy/R2P2 artifact checks.