feat: add discovery

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn/Cargo.toml

@@ -15,7 +15,7 @@ axum.workspace = true
 serde = { version = "1.0.197", features = ["derive"] }
 uuid = { version = "1.7.0", features = ["v4"] }
 tower-http = { version = "0.6.0", features = ["cors", "trace"] }
-notmad = "0.6.0"
+notmad = "0.7.1"
 tokio-util = "0.7.12"
 async-trait = "0.1.83"
 nodrift = "0.2.0"
@@ -24,3 +24,7 @@ prost-types = "0.13.3"
 prost = "0.13.3"
 bytes = "1.8.0"
 tonic = { version = "0.12.3", features = ["tls", "tls-roots"] }
+toml = "0.8.19"
+dirs = "5.0.1"
+futures = "0.3.31"
+reqwest = { version = "0.12.9", features = ["json"] }