Fix eddystone scanner for controllers without extended advertising support (Bugfix)

[Copilot]

Description

The eddystone scanner failed on Bluetooth 5.0 controllers lacking extended advertising support. The scanner assumed all BT 5.0+ controllers support extended advertising, causing failures when attempting to use extended scan commands.

Changes made:

• Dynamic feature detection: Added HCI commands to query controller capabilities (LE extended advertising support, max advertising data length) before scan initialization
• Graceful fallback: Scanner now falls back to standard LE advertising reports (EVT_LE_ADVERTISING_REPORT) when extended advertising is unsupported
• Enhanced error handling: Added HCI command status monitoring to log failures with error codes and payloads for debugging
• Buffer sizing: Dynamic recv buffer size based on controller's max advertising data length (defaults to 255 when query fails)
• Test coverage: Updated unit tests to validate behavior with both standard and extended advertising report types

The scanner now successfully detects Eddystone beacons on controllers with Extended advertising support: False, as verified on RPi4 with Cypress BT 5.0 controller (HCI v5.0).

Resolved issues

Documentation

• No documentation changes required - internal implementation fix
• Tests updated to cover both standard and extended advertising report handling
• Test output demonstrates successful beacon detection on non-extended-advertising controllers

Tests

Verified on RPi4 with Bluetooth 5.0 controller (Cypress Semiconductor, HCI v5.0):

# Extended advertising support: False
# Max advertising data length: 255
Warning: HCI Command failed. Error code: 0xc
  Found an eddystone report
Eddystone beacon detected: [Adv Report Type: LE_ADVERTISING_REPORT(2)] URL: https://www.ubuntu.com.com/

Scanner successfully:

• Detects missing extended advertising capability
• Falls back to standard LE advertising reports
• Logs HCI command failures for debugging
• Detects Eddystone beacons despite controller limitations

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