fix(ralph-loop): harden Oracle VERIFIED detection

Replace fragile regex text matching with structured detection for Oracle verification evidence.

- Add oracle-verification-detector.ts with parseOracleVerificationEvidence()

- Use structured parsing instead of multiple regex patterns

- Add comprehensive test coverage for edge cases

- Update completion-promise-detector.ts to use isOracleVerified()

- Update pending-verification-handler.ts to use structured extraction

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/ralph-loop/completion-promise-detector.ts

@@ -3,6 +3,7 @@ import { existsSync, readFileSync } from "node:fs"
 import { log } from "../../shared/logger"
 import { HOOK_NAME } from "./constants"
 import { ULTRAWORK_VERIFICATION_PROMISE } from "./constants"
+import { isOracleVerified } from "./oracle-verification-detector"
 import { withTimeout } from "./with-timeout"
 
 interface OpenCodeSessionMessage {
@@ -17,8 +18,6 @@ interface TranscriptEntry {
 	tool_output?: { output?: string } | string
 }
 
-const ORACLE_AGENT_PATTERN = /Agent:\s*oracle/i
-
 function extractTranscriptEntryText(entry: TranscriptEntry): string {
 	if (typeof entry.content === "string") return entry.content
 	if (typeof entry.tool_output === "string") return entry.tool_output
@@ -47,7 +46,7 @@ function shouldInspectSessionMessagePart(
 		return false
 	}
 
-	return promise === ULTRAWORK_VERIFICATION_PROMISE && ORACLE_AGENT_PATTERN.test(partText)
+	return promise === ULTRAWORK_VERIFICATION_PROMISE && isOracleVerified(partText)
 }
 
 function shouldInspectTranscriptEntry(
@@ -63,7 +62,7 @@ function shouldInspectTranscriptEntry(
 		return false
 	}
 
-	return promise === ULTRAWORK_VERIFICATION_PROMISE && ORACLE_AGENT_PATTERN.test(entryText)
+	return promise === ULTRAWORK_VERIFICATION_PROMISE && isOracleVerified(entryText)
 }
 
 export function detectCompletionInTranscript(