feat(backend): Minimize the non caught error logic between graph exec creation and queueing

[majdyz]

There should be no possibly failing code between graph exec creation and the actual queueing.
It could risk the graph execution being stuck on the QUEUED status.

Changes 🏗️

Moved the node exec creation and status update to be inside the graph execution logic.

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

[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 Error Handling The new code moves status updates inside a try block but doesn't handle potential database update failures that could still leave executions in an inconsistent state exec_update = cls.db_client.update_execution_status( node_exec.node_exec_id, ExecutionStatus.QUEUED, node_exec.data ) cls.db_client.send_execution_update(exec_update)

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