data(brand): complete description coverage (last 7 placeholders)

[Seungpyo1007]

Complete brand description coverage — last 7 placeholders

Follow-up to the brand-quality series (#44–#47). Replaces the generic GSMArena import placeholder (Phone brand observed in the GSMArena mobile devices dataset; imported as unverified OEM metadata...) with factual EN + KO descriptions for the 7 remaining brands that still had it:

chea, mwg, niu, parla, wnd, xcute, yu

These are obscure brands, so descriptions stay factual and minimal (country + category come straight from the dataset; the one well-documented case, yu, notes its Micromax origin). No fabricated specifics.

Result: all 189 brands now have a real description (0 import placeholders remain).

Validation

• python -m app.validate ✅ · integrity_check --strict ✅ · git diff --check clean
• Dump (site/public/v1/brands) refreshed to match.

Closes #1

[TechEngineBot]

TechEngine change review: PASS

• PR: data(brand): complete description coverage (last 7 placeholders) #50
• Ref: data/brand-desc2
• Commit: e1fcb24
• Requested by: @Seungpyo1007
• Run: https://github.com/GetTechAPI/TechEngine/actions/runs/27921220718

Check	Result
python -m app.validate	PASS
python integrity_check.py TechAPI/data --strict	PASS

Changed data

Category	Added	Modified	Deleted	Added verified	Added unverified	Added Kaggle-sourced
brand	0	0	0	0	0	0
soc	0	0	0	0	0	0
smartphone	0	0	0	0	0	0
tablet	0	0	0	0	0	0
watch	0	0	0	0	0	0
pda	0	0	0	0	0	0
gpu	0	0	0	0	0	0
cpu	0	0	0	0	0	0

Changed record examples

• No data file changes detected.

Heuristic review

• Heuristic warnings: none found.

[TechEngineBot]

TechEngine validation stats: PASS

• PR: data(brand): complete description coverage (last 7 placeholders) #50
• Ref: data/brand-desc2
• Commit: e1fcb24
• Run: https://github.com/GetTechAPI/TechEngine/actions/runs/27921220718

Data summary

Category	Total	Verified	Unverified	Missing verified	Tracked	Verified % of tracked
brand	189	0	189	0	189	0.0%
soc	2104	58	2046	0	2104	2.8%
smartphone	90118	184	89934	0	90118	0.2%
tablet	3048	0	3048	0	3048	0.0%
watch	378	0	378	0	378	0.0%
pda	110	0	110	0	110	0.0%
gpu	2030	0	2030	0	2030	0.0%
cpu	3977	976	3001	0	3977	24.5%
all	101954	1218	100736	0	101954	1.2%

Warning

Tracked verified coverage is below 50% for brand 0.0% (0/189), tablet 0.0% (0/3048), watch 0.0% (0/378), pda 0.0% (0/110), gpu 0.0% (0/2030), smartphone 0.2% (184/90118), all 1.2% (1218/101954), soc 2.8% (58/2104), and 1 more.
Tracked coverage excludes records missing the verified field; see the Missing verified column for those records.
This does not fail validation. Keep imported records verified: false until manual audit, but treat this as follow-up verification work before relying on the affected categories as curated data.

Validation notes

• Full advisory outlier listings are suppressed on successful runs because they are dataset-wide and mostly stable between PRs.
• Failure runs still include a detailed log excerpt for debugging.

Key output:

## app.validate
## integrity_check.py --strict
loaded CPU=3977 GPU=2030
✅ integrity gate: no hard anomalies.

Integrity section	Flagged lines
structural	0
CPU name/tier consistency (desktop mainstream only)	0
CPU single>multi (cinebench/geekbench — should be multi>=single)	0
CPU era-vs-score outliers	8
CPU cross-source ratio outliers (possible wrong-variant)	152
GPU cross-source ratio outliers + sanity	18