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/SPEC.md

@@ -0,0 +1,15 @@
+# Spec: fix-verdict-pass-inference
+
+## Problem
+`_infer_state_from_artifacts()` in `scripts/status.py:311` uses `if "PASS" in content:` (substring search) to determine if a VERDICT.md is PASS. A FAIL or NEEDS_REVIEW verdict containing "PASS" in its body (e.g., "All unit tests PASS") is misclassified as `complete`.
+
+The dashboard's `parse_verdict_status()` (`automaton/dashboard/core/task.py:63`) already has the correct structured-line parsing — status.py should use the same approach.
+
+## Fix
+Replace the substring check at `scripts/status.py:311` with structured-line parsing: look for `## Status:` or `- **Status**:` header lines and check the value after the colon. Return `"complete"` only for exact `PASS` match, `"human_intervention"` for `FAIL`/`NEEDS_REVIEW`, and keep the current fallback for unparseable verdicts.
+
+## Acceptance Criteria
+- A VERDICT.md with `## Status: FAIL` and "tests PASS" in the body is classified as `human_intervention`, not `complete`
+- A VERDICT.md with `## Status: PASS` is classified as `complete`
+- A VERDICT.md with no parseable status header falls through to the current behavior
+- Add a test in `tests/test_status.py` covering the FAIL-with-PASS-in-body case