backend: add @types/pg for pg type definitions

packages/backend/package.json

@@ -27,6 +27,7 @@
 		"@peertube/http-signature": "1.7.0",
 		"@sinonjs/fake-timers": "9.1.2",
 		"@syuilo/aiscript": "0.11.1",
+		"@types/pg": "^8.6.5",
 		"abort-controller": "3.0.0",
 		"ajv": "8.11.0",
 		"archiver": "5.3.1",

yarn.lock

@@ -2231,6 +2231,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/pg@npm:^8.6.5":
+  version: 8.6.5
+  resolution: "@types/pg@npm:8.6.5"
+  dependencies:
+    "@types/node": "*"
+    pg-protocol: "*"
+    pg-types: ^2.2.0
+  checksum: 49ef858d95e84a6c1be193d367996581c991cf383d8628449507cc4ce67ef43b75acb18a0f9f49f870594cdec3501ddf4d2ac3fbe0dcdaab35c295c038d47199
+  languageName: node
+  linkType: hard
+
 "@types/prettier@npm:^2.1.5":
   version: 2.7.0
   resolution: "@types/prettier@npm:2.7.0"
@@ -3644,6 +3655,7 @@ __metadata:
     "@types/node-fetch": 3.0.3
     "@types/nodemailer": 6.4.5
     "@types/oauth": ^0.9.1
+    "@types/pg": ^8.6.5
     "@types/pug": 2.0.6
     "@types/punycode": 2.1.0
     "@types/qrcode": 1.5.0
@@ -13153,14 +13165,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"pg-protocol@npm:^1.5.0":
+"pg-protocol@npm:*, pg-protocol@npm:^1.5.0":
   version: 1.5.0
   resolution: "pg-protocol@npm:1.5.0"
   checksum: b839d12cafe942ef9cbc5b13c174eb2356804fb4fe8ead8279f46a36be90722d19a91409955beb8a3d5301639c44854e49749de4aef02dc361fee3e2a61fb1e4
   languageName: node
   linkType: hard
 
-"pg-types@npm:^2.1.0":
+"pg-types@npm:^2.1.0, pg-types@npm:^2.2.0":
   version: 2.2.0
   resolution: "pg-types@npm:2.2.0"
   dependencies: