feat(firmware): validate configuration and migrate sensor-driven flight APIs

Validate configuration through its owning schemas and keep board
declarations separate from shared F722 resource ownership. Bound USB
transitions, isolate transport failures and retain restart-only activation.

Migrate navigation and flight consumers with the sensor and schema
contracts. Require explicit installation data and synchronous output
authority; board motor outputs remain inhibited.

Validation: assembled-prefix host tests, strict Clippy, platform/USB tests
and both ARM release builds. Final-source coverage and scoped Miri/Kani
evidence are retained separately from hardware qualification.

firmware/libs/kaptan-data-channel/Cargo.toml

@@ -9,6 +9,7 @@ version.workspace = true
 workspace = true
 
 [dependencies]
+critical-section = "1.2"
 kaptan-err-reportable = { path = "../kaptan-err-reportable" }
 kaptan-mavlink = { path = "../kaptan-mavlink", default-features = false, features = [
   "sensor-telemetry",
@@ -17,3 +18,6 @@ kaptan-sensor = { path = "../kaptan-sensor" }
 kaptan-time = { path = "../kaptan-time" }
 kaptan-tx = { path = "../kaptan-tx" }
 mavlink-core = { version = "0.18", default-features = false }
+
+[target.'cfg(not(target_os = "none"))'.dev-dependencies]
+critical-section = { version = "1.2", features = ["std"] }