Update mulit-modal price control policy

[Rader]

Summary:

• Refactored multi-modal pricing to support resolution-based tiered pricing (e.g., 720P/1080P) by replacing in-memory grouping with a two-stage database query and moving resolution matching logic to memory.
• Improved type safety by converting SkuKind from string to int across the accounting module, eliminating unsafe string conversions.
• Introduced new batch creation and distinct price query APIs to ensure atomic updates and proper grouping of price details.

[Rader]

Depends on #1249

[HaiHui886]

lgtm