Added:
- AIFinderService client methods: list_agents, get_agent, export_agent, and get_well_known_catalog
- catalog_v1 model re-exports for AI Catalog protobuf types
- Integration tests for AI Finder against catalog-projectable OASF records

Changed:
- Updated buf-generated SDK dependencies to track agntcy/dir v1.5.0
- Bumped the directory chart and dirctl image used in CI to v1.5.0