Localize Italian observability labels and reuse the refresh key

[Mjones13]

The Italian observability catalog retained 73 English-valued labels, so its existing localization fixture found 117 unchanged values against 44 intentional exceptions. Translate those 73 values while preserving all 1,583 keys, their order, placeholders and the fixture's 44 technical/proper-name exceptions. Correct the now-stale English-fallback comment. Reuse the already translated Refreshing key in the bridge's active-refresh label so its existing coverage checker no longer reports a missing Refreshing… key across 23 catalogs.

This two-file child targets #6 at ada1598a67642644ebb943d71c705950848ff0b9. The existing dependency chain remains #6 → #5 → #4 → #2. Parent branches, physical worktrees and the current #6 CI head remain unchanged. Italian commit da78dc0cc62ea2ef591e1d266e8a5afb6f0282cc is retained, followed by the one-line refresh-label commit; no history rewrite occurred.

Validation at source 834c3582924f5ea3b44ae042c8d57f7c7a967fc5:

• The complete existing Italian fixture method ran verbatim with contained Swift 6.2 Foundation/Testing and the same resource-relative layout. Its baseline failed with one issue at unchanged == intentionallyUnchanged; the translated catalog passed one test in one suite. The fixture and assertions remain unchanged in source.
• Authenticated plutil parsed 1,583 Italian keys. Node 24.19.0 app-locale self-checks and all 22 locale catalogs passed against the 1,583 English keys. These passes are reused at unchanged catalog bytes.
• The first CAAM coverage check failed for the bridge's missing Refreshing… key in 23 catalogs. After the one-line key reuse, its single affected renewal passed: 112 feature literal keys across 23 catalogs, with matching placeholders.
• The changed hub passed CI-pinned SwiftFormat 0.61.1 and Swift 6.2 syntax parsing; whitespace checks passed. Source hashes and package locks stayed fixed during verification. Every owned process group exited and temporary fixtures/caches were removed within the existing tool budget.

The prior macOS shard's 47-test/four-suite failure remains its own historical observation. Linux Foundation execution and syntax parsing establish bounded source evidence; native Mac app typechecking/rendering, current hosted CI, live client behavior, private endpoint access and original owner acceptance remain unproved. Parent architecture gates, opaque input, UI84 and the original NETDATA-CLIENT-01 P2 / NETDATA-DOC-01 P3 remain unchanged. No new fixture exceptions, locale sweep, timer/lifecycle/default endpoint, account control, workflow or protected operation is included.

Contributing T3 contexts:

• Original client continuation: “Resume NetData Menu Bar Monitoring,” native thread 718b02d7-0d4b-4670-b05f-57a5db28178d.
• Portfolio coordinator: “Orchestrated thread work stream processing,” /root; sole source/Git lane /root/portfolio_slot_14. The current portfolio native ID is unavailable in the bound context.

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