fix: require tracker identity markers

[stranske]

Summary

• require durable tracker label, configured label, or marker content before matching tracker issues
• keep source and consumer-template sync tracker helpers aligned
• add regression coverage for title-only and empty-body tracker candidates

Validation

• node --test .github/scripts/tests/sync-tracker-state.test.js .github/scripts/tests/issue_context_utils.test.js
• pytest -q tests/scripts/test_runner_lib.py tests/scripts/test_reference_packs.py
• python scripts/validate_template_sync.py

Source fix for sync-generated consumer PR stranske/Trend_Model_Project#5232 review comments.

[agents-workflows-bot]

Workflow source needed

PR #2050 needs either a linked GitHub issue or one valid non-issue Workflow Source before PR metadata automation can manage it safely.

Please do one of:

• Add <!-- meta:issue:123 --> or a normal Closes #123 / Related to #123 line.
• Check one Workflow Source option in the PR body.
• Add a hidden marker such as <!-- workflow-source:local_request -->, <!-- workflow-source:manual_remote -->, <!-- workflow-source:review_followup -->, <!-- workflow-source:sync_campaign -->, or <!-- workflow-source:dependabot -->.
• Add a workflow source label such as workflow:source-direct-pr, workflow:source-local-request, workflow:source-review-followup, workflow:source-sync, or workflow:no-automation.

Once a valid source is present, this warning will not be reposted.

[stranske-keepalive]

Automated Status Summary

Head SHA: bd28329
Latest Runs: ⏳ pending — Gate
Required contexts: Gate / gate, Health 45 Agents Guard / guard
Required: core tests (3.12): ⏳ pending, core tests (3.13): ⏳ pending, docker smoke: ⏳ pending, gate: ⏳ pending

Workflow / Job	Result	Logs
(no jobs reported)	⏳ pending	—

Coverage Overview

• Coverage history entries: 0

Updated automatically; will refresh on subsequent CI/Docker completions.

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Keepalive checklist

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