feat(opencode): implement OpenCodeAgentAdapter and core identity bindings

.agents/skills/lib_py/verify_session.py

@@ -66,7 +66,7 @@ def mam_orchestrator_uuids():
 def mam_row_own_uuid(row):
     if not isinstance(row, dict):
         return None
-    for k in ["claude_session_id_own", "agy_conversation_id_own", "hermes_conversation_id_own", "grok_session_id_own"]:
+    for k in ["claude_session_id_own", "agy_conversation_id_own", "hermes_conversation_id_own", "grok_session_id_own", "opencode_session_id_own"]:
         v = row.get(k)
         if v:
             return v