i18n(ja): restore lost code fences (batch 2, 37 files)

[yahonda]

What is changed, added or deleted? (Required)

Second batch of a corpus-wide sweep fixing a structural MT regression (batch 1: #23505): many config/log/command/output examples in Japanese translations lost their triple-backtick code fences entirely, degrading to plain (sometimes still-indented) text with no syntax highlighting or copy-button UI. The example content itself was untouched — only the fence markers were missing.

This PR (37 files) restores the fences to match the English source exactly:

• Fence markers (plain or taggedyaml/sql/shell/```json) added back at the correct position and indentation.
• Body content re-indented where it had accumulated stray leading whitespace from the old workaround (Markdown's "4-space indented code block" convention, used as a substitute once the real fence was lost) — every file's fence count and per-line indentation now matches the English source exactly.
• No translated prose, headings, or any other content was touched.

Verified mechanically for every file in this PR: (1) the count of ``` occurrences matches the English source exactly, and (2) for every matched code block, per-line leading-whitespace matches the English source exactly, including code fences nested inside blockquotes.

Disjoint file set from #23505 (batch 1) — the two PRs can be reviewed/merged independently. A further batch of the remaining ~179 candidate files will follow separately.

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

• This PR is translated from:
• Other reference link(s): i18n(ja): restore lost code fences (batch 1, 135 files) #23505 (batch 1 of the same sweep)

AI agent involvement

• The changes in this PR were primarily made by an AI agent on behalf of the PR author.

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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