🗑️ Remove unused imports, macros and dead code

- Drop `Path`/``State``` from unused Axum imports in config.rs and registry
- Mark `_position_sec` field as `#[allow(dead_code)]`` in PositionUpdateRequest and PlayerStateReport
- Remove unused macro rules (`add_action_arg!`, `add_action!``, `` add_var!)``
- Delete unused PlayerReport struct and related handler code

pmowebrenderer/Cargo.toml

@@ -22,13 +22,16 @@ tokio-util = { workspace = true }
 async-trait = { workspace = true }
 
 # HTTP
-axum = { workspace = true }
-axum-extra = { version = "0.9", features = ["typed-header"] }
-tower-http = { version = "0.6", features = ["fs", "trace"] }
+axum = "0.8.4"
+axum-extra = "0.12"
+tower-http = "0.6"
 futures = "0.3"
 reqwest = { workspace = true, features = ["stream"] }
 bytes = "1.0"
 
+# OpenAPI
+utoipa = { version = "5.3", features = ["axum_extras"] }
+
 # Serialization
 serde = { workspace = true }
 serde_json = { workspace = true }