fix(verify): shallow-safe changed-record detection (unblocks Tiers 1-3)

[Seungpyo1007]

CI fetches main --depth=1; the three-dot origin/main...HEAD diff needs a merge-base that a shallow main lacks, so --changed/pr always saw 0 changed records and skipped the network tiers. Switch to a direct git diff origin/main HEAD (only needs both tips). Refs #1

[Seungpyo1007]

🔎 Data verification — Tier 0 (offline existence/trust)

Scored by app.verify; posted by TechEngineBot. Informational only — the structural gate (app.validate) is separate and authoritative for merge.

Changed records in this PR

No records scored.

Full-dataset baseline

101954 record(s) scored.

Category	Total	🟢 Green	🟡 Yellow	🔴 Red	Green %
brand	189	10	179	0	5.3%
soc	2104	123	680	1301	5.8%
smartphone	90118	8453	80547	1118	9.4%
tablet	3048	174	2846	28	5.7%
watch	378	11	357	10	2.9%
pda	110	27	77	6	24.5%
gpu	2030	245	1785	0	12.1%
cpu	3977	976	3001	0	24.5%
All	101954	10019	89472	2463	9.8%

_{green = authoritative source + complete + consistent · yellow = plausible, needs confirmation · red = sparse/weak source or a hard contradiction. Promotion to verified runs in the scheduled verify-network workflow.}

[TechEngineBot]

TechEngine change review: PASS

• PR: fix(verify): shallow-safe changed-record detection (unblocks Tiers 1-3) #62
• Ref: fix/changed-diff-shallow
• Commit: 13d0a53
• Requested by: @Seungpyo1007
• Run: https://github.com/GetTechAPI/TechEngine/actions/runs/27933866558

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: fix(verify): shallow-safe changed-record detection (unblocks Tiers 1-3) #62
• Ref: fix/changed-diff-shallow
• Commit: 13d0a53
• Run: https://github.com/GetTechAPI/TechEngine/actions/runs/27933866558

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