v0.1.11 — bump turul-jwt-validator dep to 0.2

Changed

• Dependency on turul-jwt-validator bumped from "0.1" → "0.2".
  The 0.2.0 release of turul-jwt-validator is the first version
  published exclusively from its own standalone repository
  (aussierobots/turul-jwt-validator);
  the 0.1.x line on crates.io had originated from the pre-extraction
  embedded copy in this workspace. Runtime behaviour is unchanged —
  the 0.2.0 source is API-identical to 0.1.9.
• No public API changes in any turul-a2a* crate.