Fix RxDB blog and integrations guide

[adityaoberai]

What does this PR do?

Remove incorrect realtime endpoint and add missing variable

Test Plan

Visit the RxDB blog and integration guide

Related PRs and Issues

No

Have you read the Contributing Guidelines on issues?

Yes

Summary by CodeRabbit

• New Features

  • Added offline replication setup with error/status monitoring for more reliable local sync.

• Documentation

  • Simplified Appwrite client initialization examples (removed realtime endpoint configuration).
  • Added detailed guidance for Appwrite–RxDB replication, including error handling and status monitoring.

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[coderabbitai]

Walkthrough

Removed .setEndpointRealtime() calls from Appwrite Client initialization in two route files, leaving .setEndpoint() (and .setProject()) intact. Added an internal replicationState variable and a new setupReplication(db) function in src/routes/blog/post/offline-first-journal/databases.js to initialize and return Appwrite-RxDB replication state with subscriptions for error$ and active$ events.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Fix RxDB blog and integrations guide' is directly related to the changeset, which modifies RxDB documentation in both blog and integrations guide sections by removing incorrect realtime endpoint setup and adding missing replication state management.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

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