Support PostgreSQL for hulykvs

[ArtyomSavchenko]

CockroachDB verified locally:

2026-02-20T09:11:04.606520Z  INFO hulykvs: hulykvs/0.3.1
2026-02-20T09:11:04.607849Z DEBUG hulykvs: database connection string connection="postgresql://root@huly.local:26257/defaultdb?sslmode=disable"
2026-02-20T09:03:40.477781Z  INFO hulykvs: detected database backend backend=Cockroach
2026-02-20T09:03:40.511124Z  INFO actix_server::builder: starting 8 workers
2026-02-20T09:03:40.511326Z  INFO actix_server::server: Tokio runtime found; starting in existing Tokio runtime
2026-02-20T09:03:40.511343Z  INFO actix_server::server: starting service: "actix-web-service-0.0.0.0:8094", workers: 8, listening on: 0.0.0.0:8094
2026-02-20T09:03:49.219368Z  INFO actix_web::middleware::logger: 127.0.0.1 "PUT /api2/00000000-0000-0000-0000-000000000001/Huome2/MyKey1 HTTP/1.1" 204 0 "-" "curl/8.7.1" 0.034238    
2026-02-20T09:03:49.274851Z  INFO actix_web::middleware::logger: 127.0.0.1 "PUT /api2/00000000-0000-0000-0000-000000000001/Huome2/MyKey2 HTTP/1.1" 204 0 "-" "curl/8.7.1" 0.017001    
2026-02-20T09:03:49.332476Z  INFO actix_web::middleware::logger: 127.0.0.1 "GET /api2/00000000-0000-0000-0000-000000000001/Huome2 HTTP/1.1" 200 110 "-" "curl/8.7.1" 0.018929    
2026-02-20T09:03:49.368530Z  INFO actix_web::middleware::logger: 127.0.0.1 "DELETE /api2/00000000-0000-0000-0000-000000000001/Huome2/MyKey1 HTTP/1.1" 204 0 "-" "curl/8.7.1" 0.005582    
2026-02-20T09:03:49.406799Z  INFO actix_web::middleware::logger: 127.0.0.1 "DELETE /api2/00000000-0000-0000-0000-000000000001/Huome2/MyKey2 HTTP/1.1" 204 0 "-" "curl/8.7.1" 0.010180  

PostgreSQL verification:

2026-02-20T09:09:26.183947Z  INFO hulykvs: hulykvs/0.3.1
2026-02-20T09:09:26.187108Z DEBUG hulykvs: database connection string connection="postgresql://postgres:postgres@localhost:5433/postgres?sslmode=disable"
2026-02-20T09:09:26.302859Z  INFO hulykvs: detected database backend backend=Postgres
2026-02-20T09:09:26.355736Z  INFO hulykvs: applied migration migration="V1__initial"
2026-02-20T09:09:26.355762Z  INFO hulykvs: applied migration migration="V2__workspace_uuid"
2026-02-20T09:09:26.355770Z  INFO hulykvs: applied migration migration="V3__workspace_uuid"
2026-02-20T09:09:26.356817Z  INFO hulykvs: set default workspace uuid=11111111-2222-3333-4444-555555555555
2026-02-20T09:09:26.356833Z  INFO hulykvs: applied migration migration="V4__workspace_uuid"
2026-02-20T09:09:26.356841Z  INFO hulykvs: applied migration migration="V5__workspace_uuid"
2026-02-20T09:09:26.357318Z  INFO actix_server::builder: starting 8 workers
2026-02-20T09:09:26.357447Z  INFO actix_server::server: Tokio runtime found; starting in existing Tokio runtime
2026-02-20T09:09:26.357455Z  INFO actix_server::server: starting service: "actix-web-service-0.0.0.0:8094", workers: 8, listening on: 0.0.0.0:8094
2026-02-20T09:09:31.953416Z  INFO actix_web::middleware::logger: 127.0.0.1 "PUT /api2/00000000-0000-0000-0000-000000000001/Huome2/MyKey1 HTTP/1.1" 204 0 "-" "curl/8.7.1" 0.087329    
2026-02-20T09:09:31.981171Z  INFO actix_web::middleware::logger: 127.0.0.1 "PUT /api2/00000000-0000-0000-0000-000000000001/Huome2/MyKey2 HTTP/1.1" 204 0 "-" "curl/8.7.1" 0.003326    
2026-02-20T09:09:32.022839Z  INFO actix_web::middleware::logger: 127.0.0.1 "GET /api2/00000000-0000-0000-0000-000000000001/Huome2 HTTP/1.1" 200 110 "-" "curl/8.7.1" 0.007824    
2026-02-20T09:09:32.054431Z  INFO actix_web::middleware::logger: 127.0.0.1 "DELETE /api2/00000000-0000-0000-0000-000000000001/Huome2/MyKey1 HTTP/1.1" 204 0 "-" "curl/8.7.1" 0.002320    
2026-02-20T09:09:32.085229Z  INFO actix_web::middleware::logger: 127.0.0.1 "DELETE /api2/00000000-0000-0000-0000-000000000001/Huome2/MyKey2 HTTP/1.1" 204 0 "-" "curl/8.7.1" 0.004267 

[spatialy]

was looking into this today, as KVS was the only service that used specific CRDB DDL syntax

waiting for this to be merged

kudos