feat: Add Pino structured logging, release-please CI/CD and Docker pipeline

Replace all console.log/error with Pino logger (info/warn/error/debug/fatal)
for structured JSON logging in production and pretty-print in development.
Remove redundant header dumps and consolidate rate-limit logging.

Add GitHub Actions workflow with release-please for automated semver releases
and Docker build/push to GHCR on new releases.

package.json

@@ -11,12 +11,14 @@
     "ejs": "^4.0.1",
     "express": "^4.18.2",
     "fs": "^0.0.1-security",
+    "pino": "^10.3.1",
     "puppeteer": "^21.0.0",
     "puppeteer-extra": "^3.3.6",
     "puppeteer-extra-plugin-stealth": "^2.11.2",
     "sqlite3": "^5.1.7"
   },
   "devDependencies": {
-    "nodemon": "^3.0.1"
+    "nodemon": "^3.0.1",
+    "pino-pretty": "^13.1.3"
   }
 }