v0.19.1

Kotlin compatibility patch for recoverable source-file parses.\n\n- Return recoverable Kotlin top-level parse roots as source_file while preserving child error state.\n- Recover fragmented top-level fun declarations with the fun keyword, name, and parameter list so downstream source_file-rooted queries keep matching.\n- Intended to unblock Aspect/Gazelle gotreesitter drop-in testing without changing public Orion AXL queries.