fix: Add ArmFailSafe to IP Commissioning Path

[skoky]

Please consider this AI generated patch. I has solved my issue with matter bridge commissioning.

Fix: Add ArmFailSafe to IP Commissioning Path

Problem

When commissioning a Matter device over IP (Ethernet/Wi-Fi), the matc controller
skipped the mandatory ArmFailSafe command. The Matter specification requires
ArmFailSafe to be sent before CSRRequest to open a commissioning window on
the device side.

As a result, bridges and devices implementing the spec strictly (such as rs-matter)
rejected the CSRRequest with status code 0xCA (IMStatusCode::FailSafeRequired,
decimal 202), causing commissioning to fail immediately.

The arm_failsafe function and its associated constant
CMD_GENERAL_COMMISSIONING_ARMFAILSAFE existed in the codebase but were gated
behind #[cfg(feature = "ble")], making them unavailable for the standard IP path.

Fix

• Removed the #[cfg(feature = "ble")] guard from CMD_GENERAL_COMMISSIONING_ARMFAILSAFE
  and from the arm_failsafe async function, making both available unconditionally.
• Added an arm_failsafe call as the first step inside commission(), before
  send_csr. A 60-second timeout is requested, which is the standard value used
  during commissioning.
• Shifted all subsequent exchange IDs by +1 (using wrapping_add) to avoid reusing
  the exchange ID consumed by ArmFailSafe.

[tom-code]

it looks ok. thanks