i18n(ja): restore product names that were transliterated or mistranslated

[yahonda]

What is changed, added or deleted? (Required)

Several AI product, company, and model names were transliterated into katakana or translated by their literal meaning, instead of being kept in English. Two are outright wrong — a reader cannot tell what product is meant:

English	was rendered as	note
Cohere	調和する	the verb "cohere" — an AI company became a verb
Gemini	双子座	the constellation — Google's model became "the Gemini zodiac sign"
Jina AI	ジナAI	transliteration
Hugging Face	ハギングフェイス	transliteration (5 places)
Meta Llama	メタラマ	transliteration
AWS Bedrock	AWS ベッドロック	transliteration
jina-reranker	ジナ・リランカー	transliteration of a model id

Most of these are in the auto-embedding model comparison table (vector-search-auto-embedding-overview.md), where the provider column was unreadable.

13 lines across 9 files. Link URLs are unchanged — only the visible text.

How it was found

Swept the docs for known product-name transliterations, then cross-checked each hit against the English source. 12 look-alike hits were correctly excluded — ジナ inside オリジナル (original), and 開放 meaning "to open (a port/firewall)", not "OpenAI".

Which TiDB version(s) do your changes apply to? (Required)

• master (the latest development version)
• v8.5 (TiDB 8.5 versions)
• v8.4 (TiDB 8.4 versions)
• v8.3 (TiDB 8.3 versions)
• v8.2 (TiDB 8.2 versions)
• v8.1 (TiDB 8.1 versions)
• v7.5 (TiDB 7.5 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)
• v6.1 (TiDB 6.1 versions)
• v5.4 (TiDB 5.4 versions)
• v5.3 (TiDB 5.3 versions)

What is the related PR or file link(s)?

• This PR is translated from: N/A (Japanese-only fix)
• Other reference link(s): sibling ja PRs i18n(ja): add missing object-marker particle (wo) before code-span transitive verbs #23272 i18n(ja): add missing particle after Markdown links (wo before verbs, wa for subject) #23273 i18n(ja): miscellaneous review fixes (bit-shift description) #23274 i18n(ja): remove stray digits inserted before code spans #23275 i18n(ja): standardize the "Data Service" product name #23291 i18n(ja): fix trailing "page number" typo after page reference links #23294 i18n(ja): restore variable names and clean up heading anchors in system variable docs #23295 i18n(ja): unify "plan cache" katakana term (remove stray space) in sql-prepared-plan-cache.md #23297 i18n(ja): fix partial negations rendered as full negations #23311 i18n(ja): restore text dropped by the translation pipeline #23315 i18n(ja): restore text dropped by the translation pipeline (part 2) #23316 i18n(ja): restore particles dropped after code spans and links #23318 i18n(ja): repair sentences scrambled by the translation pipeline #23320 i18n(ja): restore particles dropped before nouns and copulas #23322 i18n(ja): restore the pre_split_regions heading so its anchor resolves #23324 i18n(ja): align heading anchors with the English source #23325

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

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