refactor(firmware): simplify configuration and diagnostics

firmware/libs/kaptan-log/Cargo.toml

@@ -8,13 +8,5 @@ version.workspace = true
 [lints]
 workspace = true
 
-[features]
-default = []
-# Optional allocation-free standard-log ingress. It uses one bounded atomic
-# attempt rather than a critical section, so enabling it cannot select std.
-facade = ["dep:log"]
-
 [dependencies]
 kaptan-config-derive = { path = "../kaptan-config-derive" }
-kaptan-log-derive = { path = "../kaptan-log-derive" }
-log = { version = "0.4.33", default-features = false, optional = true }