perf: fix memory leaks, optimize tracing logs, fix networking eof fragmentation bug in nvim-core and stub, and deduplicate json-rpc handlers

server/Cargo.toml

@@ -15,7 +15,7 @@ glob = "0.3.4"
 git2 = { version = "0.19.0", default-features = false }
 notify = "6.1.1"
 redb = "4.2.0"
-reqwest = { version = "0.12", default-features = false, features = ["stream", "rustls-tls"] }
+reqwest = { version = "0.12", default-features = false, features = ["stream", "rustls-tls", "json"] }
 schemars = "1.2.2"
 serde = { version = "1.0.229", features = ["derive"] }
 serde_json = "1.0.151"
@@ -28,6 +28,7 @@ tracing-subscriber = "0.3.23"
 uuid = { version = "1.26.0", features = ["v4"] }
 tracing-appender = "0.2.5"
 rmcp = { version = "3.4.0", features = ["server"] }
+thiserror = "2.0.20"
 
 [build-dependencies]
 chrono = "0.4.45"
@@ -35,8 +36,3 @@ winres = "0.1.12"
 
 [dev-dependencies]
 tempfile = "3.27.0"
-
-[[bin]]
-name = "test_rmcp"
-path = "src/bin_test.rs"
-