Misc edits

[nickchomey]

Just some miscellaneous edits that I saw while working, as well as addressing a few TODOs (some date back to my work a year ago to fix FoundationDB).

[Copilot]

Pull request overview

This PR removes obsolete FoundationDB-related workarounds and TODOs that are no longer needed after previous fixes, and updates error messages and Deno test commands.

Changes:

• Removed conditional test skips for FoundationDB storage that are no longer necessary
• Re-enabled ensureReplicationHasNoErrors calls in replication tests
• Removed deprecated FoundationDB query workaround code
• Updated error messages to remove references to deprecated atomicUpsert() and atomicUpdate() methods
• Removed deprecated --unstable flag from Deno test commands

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/unit/rx-query.test.ts	Removed FoundationDB test skip condition
test/unit/replication-protocol.test.ts	Re-enabled error checking for replication in two test cases
test/unit/reactive-query.test.ts	Removed FoundationDB test skip conditions from two tests
test/unit/attachments-compression.test.ts	Removed Bun CompressionStream compatibility skip condition
src/plugins/storage-foundationdb/foundationdb-query.ts	Removed workaround code for FoundationDB keySelector issues
src/plugins/dev-mode/error-messages.ts	Updated error messages to remove deprecated method references
package.json	Removed deprecated --unstable flag from Deno test commands

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