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/ADVERSARIAL_BUG_REPORT.md

@@ -0,0 +1,18 @@
+# Adversarial Bug Report: fix-verdict-pass-inference
+
+## Summary
+Adversarial review of the verdict parsing fix. One minor edge case noted (already in bug report).
+
+## Bugs Found
+No additional bugs beyond Bug 1 in BUG_REPORT.md (substring match within status value — Low severity, consistent with dashboard).
+
+## Analysis
+- **Consistency with dashboard**: The new `_parse_verdict_status_line()` mirrors `task.py:parse_verdict_status()` — both use the same `label in after_colon.upper()` pattern. This is deliberate alignment, not a bug.
+- **Fallback behavior**: Unparseable verdicts now return `"human_intervention"` instead of the old implicit behavior. This is safer — a verdict that can't be parsed should never be assumed PASS.
+- **Edge case — multiple status lines**: If a verdict has both `## Status: FAIL` and later `## Status: PASS`, the first match wins (FAIL). This is correct — the first status declaration is the authoritative one.
+- **Edge case — case variations**: `## status: pass` (lowercase) is handled by `low.startswith("## status")` and `after_colon.upper() == "PASS"` — correct.
+
+## Score
+0
+
+ADVERSARIAL_BUG_FIND_COMPLETE