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/boards/kakute-f7-mini-v3/Cargo.toml

@@ -9,10 +9,8 @@ version.workspace = true
 workspace = true
 
 [dependencies]
-kaptan-config = { path = "../../libs/kaptan-config" }
 platform-stm32f7 = { path = "../../platforms/stm32f7" }
-# RTIC's attribute expansion emits absolute `rtic` support paths in the final
-# board crate; the task graph and all RTIC source remain platform-owned.
+# RTIC's macro emits absolute `rtic` paths in the board crate.
 rtic = { version = "2.3", default-features = false, features = [
   "thumbv7-backend",
 ] }