Remove zero SoC placeholders from tablet records

[Seungpyo1007]

Summary

• Removed the literal "0" SoC placeholder from 53 tablet records: 38 now omit soc, and 15 use null where another record in the same folder has a specific SoC.
• Kept generic or ambiguous SoC references unchanged when the tablet's own sourced raw fields do not identify an exact vendor and model. No SoC records were edited.

Counts

Measure	Before	After
Tablet records with non-null soc	2,513	2,460
Tablet records with soc: "0"	53	0
Tablet values lacking a matching data/soc slug	0	0
Remaining generic or ambiguous tablet SoC references	313	313

The strict foreign-key count is zero because the SoC dataset itself contains placeholder slugs, including 0 and qualcomm-snapdragon. These placeholders do not establish a specific chip.

Mapping table

Sourced raw chipset	New SoC slug	Tablet records
No unambiguous vendor-and-model matches found	?	0

Placeholder SoC slugs and remaining references

Tablet counts are after this change. Smartphone counts are read from HEAD:data/smartphone, which is outside this sparse checkout. The 0 row shows its zero tablet references after cleanup and unchanged smartphone references.

SoC slug	Tablets before	Tablets after	Smartphones
0	53	0	3610
qualcomm-snapdragon	49	49	1700
quad-core-1-2-ghz	27	27	157
dual-core-1-6-ghz-cortex-a9	23	23	12
dual-core-1-5-ghz-cortex-a9	17	17	8
1-0-ghz-cortex-a8	15	15	14
exynos	10	10	100
mediatek	10	10	58
quad-core	10	10	22
quad-core-1-2-ghz-cortex-a7	10	10	25
1-2-ghz-cortex-a8	9	9	10
mediatek-helio	9	9	245
qualcomm-snapdragon-s4-pro	9	9	39
intel-atom	8	8	5
quad-core-1-0-ghz-cortex-a7	7	7	4
qualcomm-snapdragon-s3	7	7	42
quad-core-1-6-ghz-cortex-a9	6	6	2
1-0-ghz	5	5	118
dual-core-1-5-ghz	5	5	40
dual-core-1-6-ghz	5	5	3
1-2-ghz	4	4	13
800-mhz	4	4	53
dual-core-1-3-ghz	4	4	35
spice-mobile-platform-2013	4	4	21
1-2-ghz-cortex-a9	3	3	2
dual-core-1-3-ghz-cortex-a7	3	3	9
intel-atom-z3560-or-z3580	3	3	2
quad-core-1-2-ghz-cortex-a9	3	3	1
quad-core-1-3-ghz	3	3	146
quad-core-1-3-ghzquad-core-1-2-ghz-usa-model	3	3	1
qualcomm-snapdragon-s2	3	3	6
zte-mobile-platform-2012	3	3	8
1-0-ghz-cortex-a5	2	2	7
1-22-ghz-cortex-a8	2	2	1
1-5-ghz	2	2	2
alcatel-mobile-platform-2014	2	2	10
dual-core-1-0-ghz-cortex-a5	2	2	3
dual-core-1-0-ghz-cortex-a9	2	2	7
dual-core-1-2-ghz	2	2	106
huawei-mobile-platform-2011	2	2	30
nvidia-tegra-2	2	2	8
quad-core-1-1-ghz	2	2	13
quad-core-1-3-ghz-cortex-a7	2	2	125
quad-core-1-5-ghz-cortex-a7	2	2	11
qualcomm	2	2	206
800-mhz-scorpion	1	1	2
dual-core-1-2-ghz-marvell	1	1	1
intel-atom-x3	1	1	1
panasonic-mobile-platform-2011	1	1	5
pantech-mobile-platform-2008	1	1	3
quad-core-1-5-ghz	1	1	26

The remaining generic or ambiguous values have no exact vendor-and-model match in their own sourced raw chipset fields.

Validation

PYTHONIOENCODING=utf-8 python -m app.validate passed.

Refs #1