After write operations in git worktrees, subsequent reads failed with
"Database out of sync with JSONL" even though the hash check passed.
Root cause: flushToJSONLWithState() updated last_import_hash but not
last_import_time after export. CheckStaleness() compares last_import_time
against JSONL mtime, so after export the JSONL appeared "newer" than the
last import.
Additional issue: RFC3339 only has second precision but file mtimes have
nanosecond precision, causing false positives when times were within the
same second.
Fix:
- Update last_import_time after export in flushToJSONLWithState()
- Use RFC3339Nano format for nanosecond precision
- Update CheckStaleness() to parse both formats for backward compatibility
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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