Fix 10 audit bugs: path prefix matching, verdict parsing, CORS, stale-task detection, phase mapping

Batch 1 (High severity):
- Bug 1: --audit cat3 now checks .automaton/tasks/ paths
- Bug 4: Verdict PASS/FAIL uses structured ## Status: line parsing
- Bug 5: register-guards.sh checks .json/.jsonc, writes plugin key, strips comments
- Bug 7: --can-edit/--scope-check path prefix uses os.sep boundary

Batch 2 (Medium/Low severity):
- Bug 2: migrate-project.sh find command parentheses for -prune binding
- Bug 3: vram_detect model prefix matching with known-suffix whitelist
- Bug 6: dashboard reads .state file before artifact heuristic fallback
- Bug 8: removed wildcard CORS, added security headers (nosniff, DENY)
- Bug 9: stale-task detection uses .state.lastedit instead of .state mtime
- Bug 10: TEST_PLAN.md maps to test_design (was implement)

249 tests pass (up from 235). All 10 tasks driven through full workflow to completion.

tasks/fix-verdict-pass-inference/DOC_REVIEW.md

@@ -0,0 +1,12 @@
+# Doc Review: fix-verdict-pass-inference
+
+## Summary
+No documentation updates needed. The verdict parsing is an internal heuristic used only for pre-v2.0 task upgrades.
+
+## Findings
+- The `--upgrade` command is documented in AGENTS.md and README.md, but the inference logic itself is not documented.
+- The fix aligns `status.py` with the dashboard's `parse_verdict_status()` — no API change.
+- No user-facing behavior change for v2.0 tasks (which use `.state` files, not artifact inference).
+
+## Verdict
+No doc changes required.