fix: simplify debug logging for PR number detection (EME-362)

[runningcode]

Summary

Fixes EME-362 by reducing excessive debug logging when fetching PR numbers during build upload commands.

Changes

• Reduced debug logging in get_github_pr_number() from 4 statements to 2 essential ones
• Removed intermediate debug messages: "Extracted PR reference" and "Parsing PR number from"
• Kept the most important debug logs: event type validation and final PR number detection

Before

debug!("Not running in pull_request event, got: {}", event_name);
debug!("Extracted PR reference: {}", pr_number_str);
debug!("Parsing PR number from: {}", pr_number_str); 
debug!("Auto-detected PR number from GitHub Actions: {}", pr_number);

After

debug!("Not running in pull_request event, got: {}", event_name);
debug!("Auto-detected PR number from GitHub Actions: {}", pr_number);

🤖 Generated with Claude Code

---

Note

Remove two intermediate debug logs in get_github_pr_number(), keeping only event validation and final PR number detection.

^{Written by Cursor Bugbot for commit a2ed966. This will update automatically on new commits. Configure here.}

[linear]

EME-362 Simplify debug logging for PR number in sentry-cli