fix(servicer): drop the sidecar's --mm-sidecar-timeout-ms, which applied to nothing

[hello-alexmcc]

Description

Problem

From the review of #2626: the sidecar's --mm-sidecar-timeout-ms (and the SMG_VLLM_MM_SIDECAR_TIMEOUT_MS fallback it resolved) was parsed and printed in the startup line and applied to nothing. The worker's job timeout already reaches the sidecar as each job's deadline_ms (mm_sidecar_protocol.Job), which is what the sidecar uses to expire a job and to bound its result push. The README claimed the sidecar resolved the timeout "so the two processes cannot disagree", which was true only by construction of the job, not of the flag.

Solution

The flag, the sidecar_timeout_ms entry in the sidecar's settings subset and the log field are removed; the README says where the timeout actually travels. Nothing shipped with the flag (0.13.0 is unreleased).

Test Plan

• test_vllm_mm_sidecar.py: the resolved sources no longer carry sidecar_timeout_ms, test_the_parser_has_no_timeout_flag.
• pytest grpc_servicer/tests/test_vllm_mm_sidecar.py grpc_servicer/tests/test_vllm_mm_processor.py: 87 passed, 3 skipped. Hooks clean.

Checklist

• cargo +nightly fmt passes (no Rust change)
• cargo clippy --all-targets -- -D warnings passes (no Rust change)
• (Optional) Documentation updated
• (Optional) Please join us on Slack #sig-smg to discuss, review, and merge PRs

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📝 Summary

Summary by CodeRabbit

• Changes
  • Job timeouts are now provided with each job’s deadline rather than through a sidecar-wide timeout setting.
  • The sidecar’s command-line options and configuration now cover the Redis URL and namespace; the sidecar timeout option is no longer available.
  • Documentation now describes how the sidecar resolves Redis settings and how job deadlines are handled.

Walkthrough

The sidecar no longer resolves, logs, or accepts sidecar_timeout_ms. Its settings cover Redis URL and namespace. The README describes each job’s timeout as a deadline, and tests verify that the timeout setting and CLI option are absent.

Changes

Sidecar timeout setting removal

Layer / File(s)	Summary
Remove sidecar timeout setting grpc_servicer/smg_grpc_servicer/vllm/mm_sidecar.py, grpc_servicer/tests/test_vllm_mm_sidecar.py, grpc_servicer/README.md	The sidecar no longer resolves or logs sidecar_timeout_ms, and its parser no longer provides the timeout flag. Tests check that the setting and option are absent. The README describes the timeout as a per-job deadline.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: 🔵 Low · up to bffb1

The change is mergeable with a documentation correction: operators must keep explicit namespace overrides equal or the worker and sidecar can use different Redis keys.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 14.29% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 7 functions across 2 files. (1 skipped: 1…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the main change: removing the unused sidecar timeout flag.
Description check	✅ Passed	The description explains the problem, the removed timeout configuration, the README update, and the test results. It is directly related to the changeset.

Full details: Docstring Coverage

Explanation

Docstring coverage is 14.29% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 7 functions across 2 files. (1 skipped: 1 unsupported.)

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[claude]

👋 The PR description doesn't fully follow
PULL_REQUEST_TEMPLATE.md:

• Missing header: ## Changes

Please update the PR description so reviewers have the context they need.

[claude]

Clean removal. Verified that the sidecar never consumed sidecar_timeout_ms (it bounds work via each job's deadline_ms), that MmSettings.resolve(only=...) handles the narrowed subset, and that the settings_source hello field is informational only, so mixed worker/sidecar versions can't mismatch. No issues found.

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Actionable comments posted: 1

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Inline comments:
In `@grpc_servicer/README.md`:
- Line 115: Update the namespace guidance in the README to say that explicit
overrides must match: the sidecar’s --namespace value and the worker’s
--mm-sidecar-namespace value must be equal. Do not claim that the resolution
rules prevent the processes from disagreeing.

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📥 Commits

Reviewing files that changed from the base of the PR and between dceb98c and bffb15e.

📒 Files selected for processing (3)

• grpc_servicer/README.md
• grpc_servicer/smg_grpc_servicer/vllm/mm_sidecar.py
• grpc_servicer/tests/test_vllm_mm_sidecar.py

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