v4.9.3

Minor Compatibility and Stability Release

This release carries bug fixes and operational hardening. Read the summary below before upgrading or publishing.

• Strict schema validation - Ported robust tool cleaning logic from antigravity-auth. Automatically normalizes tool definitions to prevent errors with strict models (like Claude or Gemini):
• Filters out required fields that are not defined in properties
• Flattens anyOf schemas with const values into standard enum arrays
• Converts nullable array types into single types with a description note

Commit Summary

• da8f1b1 fix(auth): resolve account switching/manual auth issues (#13) and enable apply_patch
• 5260fe7 feat(tools): implement strict schema cleaning and validation
• 134343e feat(tools): implement comprehensive schema normalization
• 254b460 chore: consolidate version to 4.9.3