chore(gitignore): add .worktrees/ to .gitignore

[mateo-di]

Summary

Add .worktrees/ to .gitignore to support in-repo git worktree directories, following the pattern established in cloud-native (PR BerriAI#23519).

What Changed

Added:

• .worktrees/ entry in .gitignore to prevent tracking local worktree checkouts

Modified:

• N/A

Removed:

• N/A

Architectural Context

EAD: N/A - small change

Architectural Decisions Made:

• N/A - small change

Review Focus Areas

Critical areas (require thorough review):

1. .gitignore - verify the entry correctly ignores the .worktrees/ directory

Safe to skip: N/A - single-line change

Deployment Impact

• Not applicable (docs, tests only)

Migration & Breaking Changes

• No migrations or breaking changes

Security Considerations

• No security impact

Performance Impact

• No performance impact

Tests

• No tests needed (gitignore-only change)

Dependencies

• Related: CartoDB/cloud-native#23519 (same pattern)

How to Validate

1. Verify .worktrees/ appears in .gitignore
2. Create a test directory .worktrees/test and confirm git status does not show it

AI-Generated Code Notice

• This PR contains AI-generated code
• Areas requiring extra verification: N/A - trivial gitignore entry
• Not applicable

Coding Standards Compliance

• Changes follow team coding standards
• No violations of deprecated patterns

Checklist

• PR title follows convention
• Shortcut story linked
• One issue per PR
• Appropriate labels applied
• Reviewers assigned (or auto-assigned)
• AI review findings addressed (if applicable)