build: configure 16mb factory layout

[baba-dev]

Summary

• add a dedicated 16 MB factory-only partition table for Tab5
• wire sdkconfig defaults to always select the new table and disable SPIFFS staging
• ensure CI reports flash usage after the build and drop the non-contiguous linker flag for the oversized app

Testing

• ⚠️ idf.py build (aborted due to long compile time in the container)

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https://chatgpt.com/codex/tasks/task_e_68cef25b6ac88324b743ebcd4a4060ed

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

[P1] Update sdkconfig to use new 16MB partition table

The defaults now reference partitions_no_ota_16mb.csv, but the committed sdkconfig still points to partitions.csv (10MB factory plus SPIFFS). Because idf.py uses the checked-in sdkconfig, CI and local builds will keep the old partition layout while the build scripts no longer stage SPIFFS assets. If the factory image grows past 10 MB, the build will still fail with a partition overflow despite the new table existing. Regenerate platforms/tab5/sdkconfig or adjust it to use the 16 MB CSV so the larger layout is actually applied.

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