fix: deploy SessionStart hooks in gt install for Mayor role

Adds CI fix to run go generate before build steps.

- Adds claude.EnsureSettingsForRole() call in gt install after CLAUDE.md
- Adds go generate ./internal/formula/... to ci.yml (test, lint, integration jobs)
- Adds go generate ./internal/formula/... to integration.yml

The go generate step creates the embedded formula JSON files that are
gitignored but required for the go:embed directive in embed.go.

Fixes #84

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/integration.yml

@@ -29,6 +29,9 @@ jobs:
           git config --global user.name "CI Bot"
           git config --global user.email "ci@gastown.test"
 
+      - name: Generate embedded files
+        run: go generate ./internal/formula/...
+
       - name: Build
         run: go build -v ./cmd/gt