feat: add indexer and torrent REST controllers with service layer

- Add config module for yaml config (database, indexers, torrent)
- Add indexer module with Torznab protocol support
- Add IndexerService and TorrentService for business logic
- Add REST controllers for indexer search and torrent management
- Add Docker Compose for PostgreSQL and Jackett
- Add ERD documentation for database schema

Cargo.toml

@@ -12,6 +12,7 @@ axum = "0.8"
 tokio = { version = "1", features = ["rt-multi-thread", "macros"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
+serde_yaml = "0.9"
 tower-http = { version = "0.6", features = ["cors", "trace"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
@@ -20,6 +21,8 @@ reqwest = { version = "0.12", default-features = false, features = ["json", "coo
 async-trait = "0.1"
 thiserror = "2"
 url = "2"
+roxmltree = "0.20"
+base64 = "0.22"
 
 [profile.release]
 opt-level = 3