chore: fix stale validator references (scripts.validate → app.validate)

[Seungpyo1007]

What

Two tiny doc/config corrections — no code behavior change, no data change (so no dump refresh needed).

• app/validate.py docstring: python -m scripts.validate → python -m app.validate. There is no scripts/ module; the validator lives at app/validate.py, matching the README and the validate-data CI workflow.
• .gitignore: removed a stale note referencing a non-existent data/_staging/ directory.

Why

Leftover references from an old module layout were misleading. Surfaced during a repo-wide cleanup pass.

Refs #1

[TechEngineBot]

TechEngine change review: PASS

• PR: chore: fix stale validator references (scripts.validate → app.validate) #126
• Ref: chore/doc-fixups
• Commit: 320170a
• Requested by: @Seungpyo1007
• Run: https://github.com/GetTechAPI/TechEngine/actions/runs/29321349686

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: chore: fix stale validator references (scripts.validate → app.validate) #126
• Ref: chore/doc-fixups
• Commit: 320170a
• Run: https://github.com/GetTechAPI/TechEngine/actions/runs/29321349686

Data summary

Category	Total	Verified	Unverified	Missing verified	Tracked	Verified % of tracked
brand	207	10	197	0	207	4.8%
soc	2104	123	1981	0	2104	5.8%
smartphone	93396	8453	84943	0	93396	9.1%
tablet	3455	174	3281	0	3455	5.0%
watch	433	11	422	0	433	2.5%
pda	140	27	113	0	140	19.3%
gpu	2030	244	1786	0	2030	12.0%
cpu	3977	986	2991	0	3977	24.8%
all	105742	10028	95714	0	105742	9.5%

Warning

Tracked verified coverage is below 50% for watch 2.5% (11/433), brand 4.8% (10/207), tablet 5.0% (174/3455), soc 5.8% (123/2104), smartphone 9.1% (8453/93396), all 9.5% (10028/105742), gpu 12.0% (244/2030), pda 19.3% (27/140), 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