chore: release v0.3.0

[github-actions]

🤖 New release

• ai-catalog: 0.2.1 -> 0.3.0 (✓ API compatible changes)
• ai-catalog-validate: 0.2.1 -> 0.3.0 (✓ API compatible changes)
• ai-catalog-trust: 0.2.1 -> 0.3.0
• ai-catalog-oci: 0.2.1 -> 0.3.0 (⚠ API breaking changes)

⚠ ai-catalog-oci breaking changes

--- failure pub_module_level_const_missing: pub module-level const is missing ---

Description:
A public const is missing or renamed
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.48.0/src/lints/pub_module_level_const_missing.ron

Failed in:
  AI_CATALOG_MEDIA_TYPE in file /tmp/.tmppZcIYH/ai-catalog-oci/src/lib.rs:17

Changelog

ai-catalog

0.3.0 - 2026-09-10

Added

• add known media type constants (#23)

ai-catalog-validate

0.3.0 - 2026-09-10

Added

• add known media type constants (#23)

ai-catalog-trust

0.2.1 - 2026-09-01

Other

• remove AGNTCY references, migrate to trusted publishing (#16)

ai-catalog-oci

0.3.0 - 2026-09-10

Added

• add known media type constants (#23)

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This PR was generated with release-plz.