v2.9.1

Urgent patch to fix a critical dependency mismatch that broke new installations from PyPI.

The v2.9.0 release introduced a breaking architectural change by migrating to the new pydantic-ai capabilities API. While requirements.txt was correctly updated to >= 1.99.0, the package metadata in pyproject.toml was accidentally missed. As a result, users performing a fresh pip install ai-sub could receive an older, incompatible version of pydantic-ai-slim, leading to immediate runtime crashes during agent initialization. This patch synchronizes the metadata to ensure all installation methods enforce the correct version.

Fixes & Improvements:

• Critical Dependency Alignment: Enforced pydantic-ai-slim >= 1.99.0 in pyproject.toml to strictly match project requirements and requirements.txt.
• Metadata Synchronization: Bumped project version to 2.9.1 to ensure PyPI correctly distributes the fixed metadata.

Full Changelog: v2.9.0...v2.9.1