chore(plugins): Refactor the badge backend to store data in database instead of memory. Fix conversation as well

Signed-off-by: Rbillon59 <r.billon@celonis.com>

plugins/badges-backend/package.json

@@ -44,23 +44,21 @@
     "cors": "^2.8.5",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",
+    "knex": "^2.4.2",
     "lodash": "^4.17.21",
     "supertest": "^6.3.3",
     "winston": "^3.2.1",
     "yn": "^4.0.0"
   },
   "devDependencies": {
+    "@backstage/backend-test-utils": "workspace:^",
     "@backstage/catalog-client": "workspace:^",
     "@backstage/cli": "workspace:^",
     "@backstage/core-app-api": "workspace:^",
     "@backstage/dev-utils": "workspace:^",
     "@backstage/test-utils": "workspace:^",
-    "@testing-library/jest-dom": "^5.10.1",
-    "@testing-library/react": "^12.1.3",
-    "@testing-library/user-event": "^14.0.0",
     "@types/node": "*",
-    "cross-fetch": "^3.1.5",
-    "msw": "^0.49.0"
+    "cross-fetch": "^3.1.5"
   },
   "files": [
     "dist"