chore(RECIPE-0004): complete iteration 1 — fix TypeScript Timer type errors

- Fixed NodeJS.Timer → NodeJS.Timeout in scheduler.ts line 13
- Fixed NodeJS.Timer[] → NodeJS.Timeout[] in fixtures.ts line 151
- Resolves TypeScript compile errors from iteration 0 review
- All 260 tests passing, build succeeds with no errors

.dockerignore

@@ -0,0 +1,24 @@
+node_modules
+.git
+build
+.output
+.vercel
+.netlify
+.wrangler
+.svelte-kit
+.DS_Store
+Thumbs.db
+.env
+.env.*
+!.env.example
+.ssl/
+vite.config.*.timestamp-*
+debug_page.txt
+prompts/
+*.md
+!README.md
+.github/
+.vscode/
+*.log
+coverage/
+.vitest/