release v1.3: fix crash loop (FileNotFoundError), add content chunking

ERROR FIXED:
- FileNotFoundError on deleted session files caused 2,551 restarts/24h
- Embedding token overflow for long messages (exceeded 4K token limit)

ROOT CAUSES:
1. File opened before existence check - crash when OpenClaw deletes session files
2. No content truncation for embedding - long messages failed silently

FIXES:
1. Added pre-check for file existence before open()
2. Added try/catch for FileNotFoundError
3. Added chunk_text() for long content (6000 char chunks with 200 char overlap)
4. Each chunk stored separately with metadata (chunk_index, total_chunks)

IMPACT:
- Eliminates crash loop
- No memory loss for long messages
- Graceful recovery on session rotation

watcher/realtime_qdrant_watcher.py

@@ -1,11 +1,14 @@
 #!/usr/bin/env python3
 """
-TrueRecall v1.2 - Real-time Qdrant Watcher
+TrueRecall v1.3 - Real-time Qdrant Watcher
 Monitors OpenClaw sessions and stores to memories_tr instantly.
 
 This is the CAPTURE component. For curation and injection, install v2.
 
 Changelog:
+- v1.3: Fixed crash loop (2551 restarts/24h) from FileNotFoundError on deleted session files.
+        Added chunking for long content (6000 char chunks) to prevent embedding token overflow.
+        Improved error handling for session file lifecycle.
 - v1.2: Fixed session rotation bug - added inactivity detection (30s threshold)
         and improved file scoring to properly detect new sessions on /new or /reset
 - v1.1: Added 1-second mtime polling for session rotation