Refactor server-side video retrieval logic to first check local cache via `videoSyncService.getVideos` and `videoSyncService.getVideo`, falling back to `bunnyService.getVideo` only if cache misses. This change removes database merging logic from `videoSyncService` and integrates it into `BunnyStorage` when retrieving individual videos, optimizing data access.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 2cd2c0bc-434c-4bc9-ad3f-b99d3897a0d1
Replit-Commit-Checkpoint-Type: full_checkpoint
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