feat(sync): upload Ego Portal E2 conversion outputs

[shark0F0497]

Summary

• add E2 conversion source snapshots to the existing Sync Worker
• resolve approved e2_multimodal_conversion output MCAP and calibration metadata
• upload the E2 Job-generated calibration.json as a Hilbert ParamFile first
• reuse READY ParamFiles and persist ParamFile state in the sync snapshot
• register E2 output MCAP with ParamFileMotionStoreID
• block MCAP upload whenever E2 calibration registration or upload is incomplete
• keep original, Stereo Split, and depth-normalization sync behavior unchanged
• validate E2 calibration object identity and SHA-256 metadata

Upload order

1. Register/recover Hilbert ParamFile
2. Upload calibration.json
3. FinishParamFileUpload
4. Register RawData with ParamFileMotionStoreID
5. Upload output_bag.mcap
6. FinishRawDataUpload

Validation

• gofmt -w internal/services/sync_source_snapshot.go internal/services/sync_worker.go
• go test ./internal/services/...
• go test ./...
• git diff --check

Design alignment

The E2 calibration.json is produced only by the E2 conversion Job. The Sync Worker reads and uploads that verified derivative output; it does not query or reuse Stereo Split/camera calibration records and never falls back to the original tar.