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/vendor/synopsys-usb-otg/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "synopsys-usb-otg"
+version = "0.4.0"
+authors = ["Vadim Kaushan <admin@disasm.info>"]
+description = "'usb-device' implementation for Synopsys USB OTG IP cores"
+edition = "2018"
+license = "MIT"
+repository = "https://github.com/stm32-rs/synopsys-usb-otg"
+readme = "README.md"
+keywords = ["no-std", "embedded", "usb"]
+
+[dependencies]
+critical-section = "1.2"
+riscv = { version = "0.6.0", optional = true }
+cortex-m = { version = "0.7.0", optional = true }
+embedded-hal = "0.2.4"
+vcell = "0.1.0"
+usb-device = "0.3"
+
+[package.metadata.docs.rs]
+features = ['cortex-m', 'fs']
+
+[features]
+hs = []
+fs = []
+xcvrdly = []