[Enhancement]: Add patch/minor bump option to build-release-main workflow

## Is your feature request related to a problem? Please describe.

When releasing hotfixes, the release workflow always bumps the minor version (e.g. `0.175.0` → `0.176.0`). There is no way to release a patch version (`0.175.0` → `0.175.1`).

## Proposed Solution

Add a `bump_type` input to the `build-release-main.yml` `workflow_dispatch` trigger with choices `minor` (default, preserving current behaviour) and `patch` (for hotfixes).

The `.github/actions/version` action should also accept a `bump_type` input and apply the correct version arithmetic:
- `minor`: `v{MAJOR}.{MINOR+1}.0` (current behaviour)
- `patch`: `v{MAJOR}.{MINOR}.{BUILD+1}` (new hotfix behaviour)

This is a non-breaking change — all existing push-to-main triggers continue to use minor bumping by default.

## Related

Requested via Slack by Esteban Ordano.