Add Zeitwerk eager loading check to CI

Adds a validation step that runs Zeitwerk::Loader.eager_load_all after
dependency installation to catch autoloading issues early in the CI pipeline.

This check helps prevent production crashes by detecting:
- Inflector configuration errors
- Constant definition issues
- Missing conditional checks for optional dependencies

The check runs quickly (~2 seconds) before the test matrix, providing
rapid feedback on structural issues.

Note: This check currently fails due to upstream ruby_llm ActiveRecord
dependency issues. See:
- crmne/ruby_llm#504
- crmne/ruby_llm#505

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: trevorturk

.github/workflows/cicd.yml

@@ -30,6 +30,9 @@ jobs:
         run: |
           bundle install
 
+      - name: Check Zeitwerk eager loading
+        run: bundle exec ruby -e "require 'ruby_llm/mcp'; Zeitwerk::Loader.eager_load_all"
+
       - name: Install Bun dependencies for test fixtures
         run: |
           cd spec/fixtures/typescript-mcp && bun install