fix(review): harden #211 decision lock and CLI gate per review blockers

- Bind review decision state to in-process session (pid + profile lock); drop /tmp file path.
- Fail closed on review_pr.py CLI; route live reviews through gated MCP tools only.
- Require operator_authorized on review correction; allow re-mark after correction.
- Validate remote/org/repo on mark and submit; wire review mutation proof into build_final_report.
- Add security regression tests for spoofed locks, correction flow, and CLI bypass.

Refs #211

tests/test_audit.py

@@ -330,12 +330,12 @@ class TestGatedToolAudit(_AuditWiringBase):
         mock_api.side_effect = [
             {"login": "reviewer-bot"}, self._pr("author-bot"), {"id": 7},
         ]
-        from mcp_server import init_review_decision_lock, gitea_mark_final_review_decision
-        init_review_decision_lock("prgs", "review_pr")
-        gitea_mark_final_review_decision(8, "approve", remote="prgs")
         env = self._env(GITEA_PROFILE_NAME="gitea-reviewer",
                         GITEA_ALLOWED_OPERATIONS="read,review,approve")
         with patch.dict(os.environ, env, clear=True):
+            from mcp_server import init_review_decision_lock, gitea_mark_final_review_decision
+            init_review_decision_lock("prgs", "review_pr")
+            gitea_mark_final_review_decision(8, "approve", remote="prgs")
             r = gitea_submit_pr_review(pr_number=8, action="approve",
                                        body="LGTM", remote="prgs",
                                        final_review_decision_ready=True)