feat: Implement suppression exclusions in tag mapping configuration

[kireetivar]

This PR adds support for suppression exclusions in Aviator tag mapping.

Aviator can now skip auto-suppressing issues that match configured exclusions. The config shape is extensible, but for now we only support categories.

Changes

• add suppression_exclusions to tag mapping config
• validate exclusion entries during YAML parsing
• apply exclusions when deciding whether to suppress issues
• update default YAML comments and native-image reflect config
• add tests for validation, YAML binding, matching, and suppression behavior

Example

suppression_exclusions:
  - categories:
      - "Privacy Violation"