Merge branch 'development' into temp/scheduler-get-perf

Author: victor-Lopez25

.changesets/add_check_ethernet.md …ets/archive/v6.0.0/add_check_ethernet.md.changesets/add_check_ethernet.md renamed to .changesets/archive/v6.0.0/add_check_ethernet.md .changesets/add_check_ethernet.md renamed to .changesets/archive/v6.0.0/add_check_ethernet.md

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+release: patch
+summary: Fix incorrect usage of non-volatile buffers in peripherals. This wrong usage was causing undefined behaviour, since the compiler could optimize out reads and writes that should have been going directly to memory.
+
+There's a minor API change: now the MPU macros for memory regions include the volatile keyword for the non-cached variants.

.changesets/archive/v6.0.0/fix-volatiles.md

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+release: minor
+summary: move initialization outside constructor in PWM, DualPWM, Encoder and InputCapture

…ix-mpu-synamic-regions-linker-symbols.md …ix-mpu-synamic-regions-linker-symbols.md.changesets/hotfix-mpu-synamic-regions-linker-symbols.md renamed to .changesets/archive/v6.0.0/hotfix-mpu-synamic-regions-linker-symbols.md .changesets/hotfix-mpu-synamic-regions-linker-symbols.md renamed to .changesets/archive/v6.0.0/hotfix-mpu-synamic-regions-linker-symbols.md

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+release: major
+summary: Redesign fault handling, protections, and Board bootstrap around explicit fault policies
+
+This PR changes the public integration contract for applications built on ST-LIB.
+
+Breaking changes:
+
+- `Board` now takes the fault policy type as its first template parameter.
+- The global `FAULT` runtime is owned exclusively by `FaultController`.
+- User state machines are now nested under the global `OPERATIONAL` state through `FaultPolicy` or `FaultPolicyNoMachine`.
+- Protections are now compile-time `Board` request objects evaluated through `Board::ProtectionEngine`; the previous `ProtectionManager` and boundary split is no longer the active model.
+- Runtime reporting is unified under `PANIC(...)`, `FAULT(...)`, `WARNING(...)`, and `INFO(...)`.
+- The real bootstrap path is `Board::init()`. Legacy `STLIB::start()`, `STLIB::update()`, `STLIB_LOW::start()`, and `STLIB_HIGH::start()` must not be used as the integration path.
+
+Migration notes:
+
+- Declare the board as `Board<YourFaultPolicy, ...>`.
+- Use `FaultPolicy<app_machine, on_fault_enter>` when you want an operational state machine nested under the global runtime.
+- Use `FaultPolicyNoMachine<on_fault_enter>` when you only need a fault-entry callback.
+- Use `DefaultFaultPolicy` when you want neither an operational machine nor a fault-entry callback.
+- Declare protections with `Protections::protection<"name", source>(...)` and pass the resulting request objects to `Board`.
+- In the main loop, drive the runtime through `FaultController::check_transitions()`, `Board::evaluate_protections()`, and `Diagnostics::Hub::flush()`.

.changesets/hotfix-pwm-channel4.md …ts/archive/v6.0.0/hotfix-pwm-channel4.md.changesets/hotfix-pwm-channel4.md renamed to .changesets/archive/v6.0.0/hotfix-pwm-channel4.md .changesets/hotfix-pwm-channel4.md renamed to .changesets/archive/v6.0.0/hotfix-pwm-channel4.md

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+release: minor
+summary: It is just a one word change, makes it possible to use `Board::instanceof()` to get a `constexpr auto& obj`. It works perfectly as long as you don't try using the reference before `Board::init()`.

.changesets/hotfix-sched-prescaler.md …archive/v6.0.0/hotfix-sched-prescaler.md.changesets/hotfix-sched-prescaler.md renamed to .changesets/archive/v6.0.0/hotfix-sched-prescaler.md .changesets/hotfix-sched-prescaler.md renamed to .changesets/archive/v6.0.0/hotfix-sched-prescaler.md

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+release: patch
+summary: Fix reorder issue in PWM constructor