Close parity blockers; add sprint 222-227 trackers and stale-log manifest

docs/progress_log_2026-02-26.md

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+# Progress Log - 2026-02-26
+
+## Scope Covered Today
+
+- Sprint tranche execution and validation from `206` through `227`.
+- Hard benchmark reruns on:
+  - `challenging_subset_prod_2026-02-26.jsonl`
+  - `challenging_fullstack_multifile_2026-02-26.jsonl`
+- Production-loop anti-false-green hardening, projection/fullstack contract enforcement, parity gating, and parity remediation.
+
+## Key Outcomes
+
+1. Sprints `206-211`:
+- Added anti-false-green production evidence gating.
+- Added projection-contract validation and parity/efficiency/intent consistency analyzers.
+- Status: `PARTIAL` (diagnostics/enforcement improved, parity and readiness still weak at that stage).
+
+2. Sprints `217-221`:
+- Implemented multi-file/fullstack contract gates (migration/security/SLO/rollout checks).
+- Added fullstack closure analyzer and execution tracker.
+- Status: `IMPLEMENTED`, then `PARTIAL` until parity inconsistency was addressed.
+
+3. Sprints `222-224`:
+- Added strict AB/production parity hard gate and summary metrics.
+- Eliminated unresolved divergence by blocking inconsistent runs.
+- Status: `DONE` (for gating/reporting behavior).
+
+4. Sprints `225-227`:
+- Added deterministic path-B repair layer:
+  - C++ include repair for `std::vector`.
+  - Go/Rust queue transpile skeleton normalization.
+- Integrated repair into AB path-B flow.
+- Fixed Rust gate harness initialization issue.
+- Validation result on latest reruns:
+  - `challenging_subset_prod_20260226_r7`: `ab_prod_divergence_count=0`, `ab_consistency_blocked_count=0`
+  - `challenging_fullstack_multifile_20260226_r7`: `ab_prod_divergence_count=0`, `ab_consistency_blocked_count=0`
+- Status: `DONE`.
+
+## Canonical Execution Trackers
+
+- `docs/sprint206_211_execution_tracker_2026-02-26.md`
+- `docs/sprint217_221_execution_tracker_2026-02-26.md`
+- `docs/sprint222_224_execution_tracker_2026-02-26.md`
+- `docs/sprint225_227_execution_tracker_2026-02-26.md`
+
+## Canonical Gap Registry
+
+- `docs/generator_readiness_gap_registry_2026-02-26.md`
+
+## Remaining Risk (Important)
+
+- Current path-B repair closure is pattern-driven around recurring queue-shaped transpile failures.
+- Next required tranche: broaden to non-queue semantics and first-class spec-to-execution-ready planning.