fix(ulw-loop): add fallback for Oracle verification session tracking

The verification_session_id was never reliably set because the
prompt-based attempt_id matching in tool-execute-after depends on
metadata.prompt surviving the delegate-task execution chain. When
this fails silently, the loop never detects Oracle's VERIFIED
emission.

Add a fallback: when exact attempt_id matching fails but oracle
agent + verification_pending state match, still set the session ID.
Add diagnostic logging to trace verification flow failures.
Add integration test covering the full verification chain.

src/hooks/ralph-loop/ralph-loop-event-handler.ts

@@ -136,6 +136,13 @@ export function createRalphLoopEventHandler(
 				}
 
 				if (state.verification_pending) {
+					if (!verificationSessionID && matchesParentSession) {
+						log(`[${HOOK_NAME}] Verification pending without tracked oracle session, running recovery check`, {
+							sessionID,
+							iteration: state.iteration,
+						})
+					}
+
 					await handlePendingVerification(ctx, {
 						sessionID,
 						state,