Implement WARDEN-WP-0024 experiential memory and agent sessions.

Add phase-memory bridge, warden memory CLI, route/access/sign recording,
memory-aware worker planning with OpenRouter skip, tests, wiki, and AGENTS.md
orientation for Claude, Codex, Grok, and future agent sessions.

tests/conftest.py

@@ -0,0 +1,11 @@
+"""Test configuration for ops-warden."""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+
+PHASE_MEMORY_SRC = Path(__file__).resolve().parents[2] / "phase-memory" / "src"
+if PHASE_MEMORY_SRC.exists() and str(PHASE_MEMORY_SRC) not in sys.path:
+    sys.path.insert(0, str(PHASE_MEMORY_SRC))