refactor: drop postgres backend

crates/infra-wiring/Cargo.toml

@@ -10,5 +10,4 @@ anyhow = { workspace = true }
 [features]
 default = []
 sqlite = []
-postgres = ["sqlx/postgres"]
 nats = []

crates/infra-wiring/src/lib.rs

@@ -5,8 +5,6 @@ pub use config::{AppConfig, WrapUpConfig};
 pub enum DbPool {
     #[cfg(feature = "sqlite")]
     Sqlite(sqlx::SqlitePool),
-    #[cfg(feature = "postgres")]
-    Postgres(sqlx::PgPool),
 }
 
 #[derive(Clone, Copy)]