refactor(ticket-192): extract helpers from merge_missing_ticket_records (STARTER-611)

[tom-sapletta-com]

Reduce cyclomatic complexity of merge_missing_ticket_records from CC=25 (limit 15) to CC=3 by extracting behavior-preserving module-level helpers (_ticket_identifier, _normalized_status, _reported_ticket_ids, _already_covered, _decorated_recovery, _recover_missing_records, _compatibility_report).

• Pure refactor: old-vs-new differential over 2420 generated scenarios (sprint layouts × status matrix × reported payload shapes) is byte-identical for the merged list and report.
• Adds tests/test_planfile_compat.py (13 behavior-pinning tests); consumer suites (test_queue_clean, test_context, test_planfile_queue) pass unmodified.
• ruff check clean; project/governance-check.sh --base origin/main = GOV-PASS.
• Planfile source ticket: STARTER-611.

[ifuri-validator-agent]

Validator approval after policy checks for exact head 641b49eceacb47c08dd53ab27e673579514e2112.

Ticket: ticket-192
Correlation ID: local-semcod-koru-pr-376-ticket-192
Model: zai/glm-5.3
Reviewed diff chunks: 2
Advisory LLM verdict: APPROVE
Advisory summary: Reviewed all 2 diff chunk(s). Chunk 1/2 of a behavior-preserving complexity refactor of merge_missing_ticket_records. Extracted helpers (_ticket_identifier, _normalized_status, _reported_ticket_ids, _already_covered, _decorated_recovery, _recover_missing_records, _compatibility_report) are private module-level functions with no public interface changes, no runtime dependencies added, and logic that matches the described original semantics (id/ticket_id fallback, strip, dedupe via seen_raw, reported-payload authority, legacy/unknown decoration, sprint marker removal, sorted status counts). Ticket intent metadata is complete and consistent with the diff. Required checks (onedev/local-verify, standard packs / conformance) all PASS per the protected assessment. | Refactor extracts helpers from merge_missing_ticket_records with behavior preserved (per PR differential testing), adds 13 thorough behavior-pinning tests. Required checks (onedev/local-verify, standard packs / conformance) pass. No security or blocking concerns visible in this chunk.
Advisory findings: none
The LLM output above is advisory and was not used as the approval trust root.
Semantic review prerequisite: not_required; policy 676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7.

Actual PR impact radar

Exact range: 17270fafdea8003c07d0dfd2a44fcb4b1867e6a4...641b49eceacb47c08dd53ab27e673579514e2112
Change digest: 2d141ff552d5567c7931424005ca0687fc3040fe653f07d4e68ad02021db42cb
Score: 56/100 (L), estimated 67 min, split recommended: true
Affected services/components: repository-wide/unclassified

Machine-readable radar JSONL and SVG

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Merge will be attempted after this approval when explicitly authorized. ## Decision record (recomputable)

DECISION D-192-1038
TICKET ticket-192
HEAD_SHA 641b49eceacb47c08dd53ab27e673579514e2112
CORRELATION_ID local-semcod-koru-pr-376-ticket-192
ACTOR agent:ifuri-validator-agent[bot]
APPLIED_RULE P-CORE-015
INPUT author_login = "tom-sapletta-com"
INPUT observed_checks = ["governance / remote lifecycle=PASS","standard packs / conformance=PASS","governance / enforce=PASS","onedev/local-verify=PASS"]
INPUT required_checks = ["onedev/local-verify","standard packs / conformance"]
INPUT required_checks_source = "protected registry + GitHub applied rules (env/request)"
INPUT reviewer_login = "ifuri-validator-agent[bot]"
INPUT semantic_review_assessment = {"schema":"subactor.validator/semantic-review-assessment/v1","subject":{"repository":"semcod/koru","pull_request":376,"head_sha":"641b49eceacb47c08dd53ab27e673579514e2112","base_sha":"17270fafdea8003c07d0dfd2a44fcb4b1867e6a4","diff_sha256":"bf557a4fe294d9e7b00a47cad182f690afd71681635b686c084798b25afae447"},"policy":{"policy_schema":"subactor.validator/semantic-review-policy/v1","policy_version":1,"policy_sha256":"676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7","required":false,"critical_paths":[],"observed_paths":["project/TICKETS.md","project/ticket-192/README.md","project/ticket-192/intent.json","src/koru/planfile_compat.py","tests/test_planfile_compat.py"]},"grounding":"full-diff-not-per-finding-proof","execution_authority":false,"status":"not_required","reason":null,"review_sha256":null,"unresolved":[]}
INPUT superseded_checks = ["smoke"]
INPUT ticket_radar_receipt = {"schema":"subactor.ticket-radar/v1","base_sha":"17270fafdea8003c07d0dfd2a44fcb4b1867e6a4","head_sha":"641b49eceacb47c08dd53ab27e673579514e2112","change_digest":"2d141ff552d5567c7931424005ca0687fc3040fe653f07d4e68ad02021db42cb","score":56,"complexity":"L","estimated_minutes":67,"split_recommended":true,"services":[],"authority":"ADVISORY","promotion":"FORBIDDEN"}
VERDICT APPROVE AUTHORITY DETERMINISTIC
REJECTED REQUEST_CHANGES BECAUSE NO_UNSAFE_CHANGE_REASON_FOUND
ADVISORY llm_verdict = "APPROVE" MODEL "zai/glm-5.3"
ASSERT VERDICT_AUTHORITY != "ADVISORY"