Add Amplitude analytics integration and tracking (#27890)

- Introduced AmplitudeProvider component for initializing Amplitude analytics.
- Integrated user tracking in AppContextProvider to report user and workspace information.
- Added event tracking for workflow log filter selections.
- Updated package.json and pnpm-lock.yaml to include @amplitude/unified dependency.

web/package.json

@@ -44,6 +44,7 @@
     "knip": "knip"
   },
   "dependencies": {
+    "@amplitude/unified": "1.0.0-beta.9",
     "@emoji-mart/data": "^1.2.1",
     "@floating-ui/react": "^0.26.28",
     "@formatjs/intl-localematcher": "^0.5.10",