test: add Qwen3.5 2B/4B UD-Q4_K_XL physical acceptance lane

[daniele21]

Adds a dedicated physical Android acceptance coordinator for the exact Qwen3.5 2B and 4B UD-Q4_K_XL artifacts already installed inside Harnex.

Observable outcome:

• no Mac-side GGUF paths or duplicate model copies;
• no rebuild/reinstall of Harnex, preserving the Play-owned private ModelStore;
• Harnex itself runs the existing PhoneTestController.runFullValidation() path against the selected installed artifact;
• the runner captures the visible privacy-safe report + screenshot through ADB;
• exact SHA-256 and UD-Q4_K_XL identity are checked for 2B and 4B;
• PASS requires generation metrics, cancellation, repeated load/generate/unload PSS evidence and thermal evidence;
• a local manifest binds the two reports to device/app/runner provenance.

Scope boundary:

• does not expose a test-only control endpoint in the release app;
• does not copy/read Harnex private GGUF files from the Mac;
• does not change the product catalog;
• does not promote a runtime profile automatically;
• does not replace the separate LOW_MEMORY/cross-model-switch gate.

Physical interaction is intentionally limited to selecting each already-installed model and tapping Diagnostics > Validation > Run full validation; evidence collection and identity verification are then automated by the runner.

[daniele21]

Reworking this lane to use Harnex's host-owned model store directly. The physical acceptance path will validate already-installed curated 2B/4B UD-Q4_K_XL artifacts in Harnex instead of requiring GGUF paths from the Mac.

[daniele21]

I hit a stale-content conflict while replacing the runner, so I’m re-reading the exact branch HEAD before applying the change. No repository state has been overwritten.

[daniele21]

Continuing with a read-first update on the branch; the previous conflict was only a stale SHA mismatch.

[daniele21]

I’m now aligning the change with the repository guidance and the exact current branch state before writing.

[daniele21]

(No action needed from you while I update the branch.)

[daniele21]

I’m switching the lane to Harnex-owned validation now.

[daniele21]

The final implementation will avoid Mac GGUF paths entirely.

[daniele21]

Proceeding.

[daniele21]

(Implementation in progress.)

[daniele21]

I’ll post a concise summary once the branch update is complete.

[daniele21]

Updating branch state now.

[daniele21]

Last status note: moving to exact-file updates next.

[daniele21]

File updates follow.

[daniele21]

Applying the host-owned validation implementation.

[daniele21]

Final note before code update.

[daniele21]

Switching now.