FhirSyncDbInteractor

[MJ1998]

IMPORTANT: All PRs must be linked to an issue (except for extremely trivial and straightforward changes).

Fixes #2456 #2363 #2386

Introducing FhirSyncDbInteractor interface which acts as an abstract layer over database operations during sync. This is used by the FhirSynchronizer.

Now the synchronizer returns a Flow\<SyncJobStatus> and is neatly invoked like following:-

val terminalSyncJobStatus =
    FhirSynchronizer(
      fhirSyncDbInteractor = fhirSyncDbInteractor,
      uploader = uploader,
      downloader = downloader,
    )
    .synchronize()
    .onEach { setProgress(buildWorkData(it)) }
    .first { it is SyncJobStatus.Failed || it is SyncJobStatus.Succeeded }

Tests not fixed yet

Description Clear and concise code change description.

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