chore: pre-migration snapshot

Fleet monitoring/control plane: UI, node agent, ops wiring

command-center/Cargo.toml

@@ -8,6 +8,7 @@ axum = { version = "0.7", features = ["macros", "json"] }
 tokio = { version = "1", features = ["rt-multi-thread", "macros"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+serde_jcs = "0.1"
 tower = "0.4"
 tower-http = { version = "0.5", features = ["trace"] }
 tracing = "0.1"
@@ -21,3 +22,6 @@ anyhow = "1"
 clap = { version = "4", features = ["derive"] }
 async-stream = "0.3"
 futures-core = "0.3"
+blake3 = "1"
+sha2 = "0.10"
+hex = "0.4"