feat(config): automatically enable asset-processing worker if video is enabled

[hmans]

Changes

• feat(config): automatically enable asset-processing worker if video is enabled

Verification

• Passed: mise x -- pnpm run check
• Passed: mise x -- pnpm run test
• Passed: mise run test-cli

Notes

• Automatically enables the asset-processing worker if CHATTO_VIDEO_ENABLED is set to true, ensuring that video uploads can actually be processed.
• Created by ChattoBot. Review the diff and CI results before merging.