GRDB: add write and read methods

[leandroalonso]

📘 Part of: #2773

To unlock the power of concurrent reads, we need to use GRDB write and read methods. This is a first step in this direction.

Since there are many places that this needs to be changed, I'll raise one PR per data manager — this makes it easier to be reviewed.

To test

1. ✅ Run the app form scratch and ensure the app works just fine
2. Subscribe to a few podcasts
3. Change grdb in FeatureFlag.swift to false
4. Re-run the app
5. ✅ Everything should be there

Checklist

• I have considered if this change warrants user-facing release notes and have added them to CHANGELOG.md if necessary.
• I have considered adding unit tests for my changes.
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

[leandroalonso]

This call was split in two in one of the GRDB PRs as explained here.

This method is back to being a single block, which is what it should be. I had to add a method so that the crash that was happening before doesn't happen anymore.

With this change we're back at how it was before + working correctly with GRDB.

[SergioEstevao]

Non related to the changes above but noticed this quotes issues when testing this PR on the ServerPodcastManager+Update.swift in the cleanupDeletedEpisodes method.

let serverUuids = serverEpisodes.compactMap { $0["uuid"] as? String }.map { "\"\($0)\"" }

[SergioEstevao]

Working correctly.

Installed from scratch, smoke test it and them changed the FF back and ran again.

All good!

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ EXC_BREAKPOINT: Exception 6, Code 1, Subcode 7174814644 -[FMDatabase executeQuery:withArgumentsInArray:... View Issue
• ‼️ EXC_BREAKPOINT: SJUserEpisode -[FMDatabase executeQuery:withArgumentsInArray:... View Issue
• ‼️ EXC_BREAKPOINT: SJEpisode.autoDownloadStatus -[FMDatabase executeQuery:withArgumentsInArray:... View Issue

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[leandroalonso]

About the Sentry error, this code hasn't even make to TestFlight yet.