Named pipes ota su

[r-recchia]

Summary

Testing

[gemini-code-assist]

Code Review

This pull request introduces named pipe communication for the OTA provider application, enabling external control, and adds a new Python test (TC_SU_2_8.py) for multi-fabric OTA scenarios. The changes span C++ and Python, modifying the OTA provider, adding new test infrastructure, and implementing the test case. My review has identified several issues, including a bug in the pipe cleanup logic, an unused variable in the C++ command handler, and incorrect API usage in the new Python test and its helper functions. Additionally, there is some commented-out code that should be removed for clarity. The comments regarding create_acl_entry in apps.py and apps.pyi have been removed as they refer to a type hint file update, which is outside the scope of code changes.

[github-actions]

PR #41708: Size comparison from 1089161 to 1297b97

Full report (5 builds for cc32xx, realtek, stm32)

platform	target	config	section	1089161	1297b97	change	% change
cc32xx	air-purifier	CC3235SF_LAUNCHXL	FLASH	554906	554906	0	0.0
			RAM	205776	205776	0	0.0
	lock	CC3235SF_LAUNCHXL	FLASH	587786	587786	0	0.0
			RAM	205872	205872	0	0.0
realtek	light-switch-app	rtl8777g	FLASH	706952	706952	0	0.0
			RAM	106964	106964	0	0.0
	lighting-app	rtl8777g	FLASH	757896	757896	0	0.0
			RAM	127296	127296	0	0.0
stm32	light	STM32WB5MM-DK	FLASH	470224	470224	0	0.0
			RAM	141352	141352	0	0.0