chore: add logs/ directory to .gitignore

[ChristopherJHart]

Summary

Adds the logs/ directory to .gitignore to prevent Claude Code conversation logs from
being tracked in version control.

Justification

The logs/ directory is used by Claude Code to store conversation history and session data
during AI-assisted development. This directory should not be tracked in version control
because:

1. Contains local development artifacts: Claude Code conversation logs are specific to
   individual developer sessions and have no value to other contributors
2. Privacy and security: Conversation logs may contain sensitive information, API
   interactions, or debugging details that shouldn't be shared in the repository
3. Noise in git status: The untracked logs/ directory creates unnecessary clutter in
   git status output during Claude Code sessions
4. Prevent accidental commits: Reduces the risk of inadvertently committing large
   conversation history files that accumulate during extended AI-assisted development sessions
5. Consistency: Aligns with the existing pattern of ignoring development-time artifacts
   like .terraform/, .env, and *.log files

While individual *.log files are already ignored, the logs/ directory itself needs
explicit exclusion to prevent the directory structure from being tracked.

Changes

• Added logs/ entry to .gitignore at line 28

Testing

• Verified that the logs/ directory no longer appears as untracked in git status after
  this change
• Confirmed no impact to existing ignored patterns