Fix import related TypeScript errors (#9321)

* Add missing @types packages

* Fix TS1272 type only imports

* Fix TS2821 import assertion

packages/backend/package.json

@@ -137,8 +137,11 @@
 		"@types/bcryptjs": "2.4.2",
 		"@types/bull": "4.10.0",
 		"@types/cbor": "6.0.0",
+		"@types/color-convert": "^2.0.0",
+		"@types/content-disposition": "^0.5.5",
 		"@types/escape-regexp": "0.0.1",
 		"@types/fluent-ffmpeg": "2.1.20",
+		"@types/ioredis": "4.28.10",
 		"@types/jest": "29.2.4",
 		"@types/js-yaml": "4.0.5",
 		"@types/jsdom": "20.0.1",
@@ -162,6 +165,7 @@
 		"@types/sharp": "0.31.0",
 		"@types/sinonjs__fake-timers": "8.1.2",
 		"@types/speakeasy": "2.0.7",
+		"@types/syslog-pro": "^1.0.0",
 		"@types/tinycolor2": "1.4.3",
 		"@types/tmp": "0.2.3",
 		"@types/unzipper": "0.10.5",