feat: implement postgres kvbackend (#4421)

tests-integration/Cargo.toml

@@ -90,5 +90,5 @@ rand.workspace = true
 script.workspace = true
 session = { workspace = true, features = ["testing"] }
 store-api.workspace = true
-tokio-postgres = "0.7"
+tokio-postgres = { workspace = true }
 url = "2.3"

tests-integration/fixtures/postgres/docker-compose-standalone.yml

@@ -0,0 +1,12 @@
+version: '3.9'
+services:
+  postgres:
+    image: postgres:14-alpine
+    ports:
+      - 5432:5432
+    volumes:
+      - ~/apps/postgres:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_USER=greptimedb
+      - POSTGRES_DB=postgres
+      - POSTGRES_PASSWORD=admin