fix(backend): Spin-up Database manager on rest.py

[majdyz]

AutoGPT-lib is used in both Rest API & Execution Manager, due to the interdependency of the module, some unexpected infra changes were inferred: DatabaseManager service is required in both RestAPI & ExecutionManager

The scope of this PR is to clear this out.

Changes 🏗️

• Initiated DatabaseManager on RestAPI service.
• Removed DATABASEMANAGER_HOST settings.

Out of scope:
Decouple DatabaseManager service from RestAPI service, and use direct async prisma query instead.

Checklist 📋

For code changes:

• I have clearly listed my changes in the PR description
• I have made a test plan
• I have tested my changes according to the test plan:
  • ...

Example test plan

• Create from scratch and execute an agent with at least 3 blocks
• Import an agent from file upload, and confirm it executes correctly
• Upload agent to marketplace
• Import an agent from marketplace and confirm it executes correctly
• Edit an agent from monitor, and confirm it executes correctly

For configuration changes:

• .env.example is updated or already compatible with my changes
• docker-compose.yml is updated or already compatible with my changes
• I have included a list of my configuration changes in the PR description (under Changes)

Examples of configuration changes

• Changing ports
• Adding new services that need to communicate with each other
• Secrets or environment variable changes
• New or infrastructure changes such as databases

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[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Architecture Change Adding DatabaseManager to rest.py changes the service architecture. Verify this doesn't create circular dependencies or race conditions between rest_server and executor services. Lock Key Change The lock key structure was simplified by removing db_manager. Verify this change doesn't break lock isolation between different database managers.

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[majdyz]

@aarushik93 I decoupled changes of dbmanager from the rest of the change in #8751, to expedite this fix.

[ntindle]

Some of these changes also match up with moving Supabase credentials provider to backend

[majdyz]

@ntindle I think you are referring to #8751

[ntindle]

No there's an open pr to move the credentials providers to the backed

[ntindle]

#8648