feat: add pr url to task object when pr made in twig

[k11kirky]

TL;DR

Added automatic detection and tracking of GitHub PR URLs created during agent tasks.

What changed?

• Added a new detectAndAttachPrUrl method to the AgentService class that:
  • Monitors bash tool execution results for GitHub PR URLs
  • Extracts PR URLs using regex pattern matching
  • Attaches detected PR URLs to the corresponding task
  • Calls the agent's attachPullRequestToTask method to update the task
• Integrated this detection into the existing message handling flow

How to test?

1. Run an agent task that creates a GitHub PR using bash commands
2. Verify that the PR URL is automatically detected in the bash output
3. Check that the PR URL is properly attached to the task
4. Confirm that webhook tracking is enabled for the PR

Why make this change?

This enhancement enables webhook tracking by automatically populating the pr_url in TaskRun output when an agent creates a GitHub PR. Previously, PR URLs created during agent tasks weren't automatically tracked, requiring manual intervention. This change improves the workflow by automatically detecting and linking PRs to their originating tasks.

[k11kirky]

• feat: add pr url to task object when pr made in twig #538 👈 (View in Graphite)
• main

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