Update Python/JS hooks to clean JSONL format + add audit report

Phase 4 Plugin Audit Progress:
- Audited all 6 Dependency hooks (all already compliant)
- Audited all 11 Crawl Validate hooks (all already compliant)
- Updated 8 Python Snapshot hooks to clean JSONL format
- Updated 1 JS Snapshot hook (title.js) to clean JSONL format

Snapshot hooks updated to remove:
- RESULT_JSON= prefix
- Extra output lines (START_TS=, END_TS=, DURATION=, VERSION=, OUTPUT=, STATUS=)

Now output clean JSONL:
{"type": "ArchiveResult", "status": "...", "output_str": "..."}

Added implementation report to TODO_hook_architecture.md documenting:
- All completed phases (1, 3, 6, 7)
- Plugin audit results with status tables
- Remaining 13 JS hooks that need updating
- Files modified list

archivebox/plugins/title/on_Snapshot__32_title.js

@@ -221,34 +221,18 @@ async function main() {
     }
 
     const endTs = new Date();
-    const duration = (endTs - startTs) / 1000;
-
-    // Print results
-    console.log(`START_TS=${startTs.toISOString()}`);
-    console.log(`END_TS=${endTs.toISOString()}`);
-    console.log(`DURATION=${duration.toFixed(2)}`);
-    if (output) {
-        console.log(`OUTPUT=${output}`);
-    }
-    console.log(`STATUS=${status}`);
 
     if (error) {
-        console.error(`ERROR=${error}`);
+        console.error(`ERROR: ${error}`);
     }
 
-    // Print JSON result
-    const resultJson = {
-        extractor: EXTRACTOR_NAME,
-        url,
-        snapshot_id: snapshotId,
+    // Output clean JSONL (no RESULT_JSON= prefix)
+    const result = {
+        type: 'ArchiveResult',
         status,
-        start_ts: startTs.toISOString(),
-        end_ts: endTs.toISOString(),
-        duration: Math.round(duration * 100) / 100,
-        output,
-        error: error || null,
+        output_str: output || error || '',
     };
-    console.log(`RESULT_JSON=${JSON.stringify(resultJson)}`);
+    console.log(JSON.stringify(result));
 
     process.exit(status === 'succeeded' ? 0 : 1);
 }