The readOnly guard was matching keywords inside string literals,
blocking legitimate queries like WHERE n.name CONTAINS "delete".
Now strips single/double-quoted strings before checking, so only
actual Cypher write keywords outside strings are blocked.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Node IDs are generated as Label:filePath (e.g., Function:src/foo.ts:bar),
so forward slashes are expected in legitimate IDs. The over-tightened
regex was dropping all path-based IDs from Cypher queries.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>