Fix: Prevent duplicate workflow runs for @claude /full-review

[strickvl]

Summary

• Fixed duplicate Claude workflow triggers when using @claude /full-review
• Added negative conditions to claude.yml to exclude /full-review comments

Problem

When someone commented @claude /full-review on a PR, both workflows would trigger:

1. claude.yml (generic @claude handler)
2. claude-code-review.yml (specific /full-review handler)

This resulted in two separate review comments being posted.

Solution

Added !contains(...) exclusion checks to the three comment-related trigger conditions in claude.yml:

• issue_comment
• pull_request_review_comment
• pull_request_review

Now the workflows are mutually exclusive:

• @claude /full-review → only triggers claude-code-review.yml
• @claude (any other text) → only triggers claude.yml

Test plan

• Comment @claude /full-review on a PR and verify only one review is posted
• Comment @claude (without /full-review) and verify the generic workflow runs