- B023: default_fetch_tracklist built a per-item lambda closing over the loop
variable `it`. Replaced with a module-level _item_get(item, key, default)
helper (takes the item as a param — no closure). Behavior unchanged; the
dict/object normalization test still passes.
- S110: the two best-effort guards in the canonical job (skip-already-pinned
read, estimate_scope active-server read) now carry `# noqa: S110 — <reason>`,
matching the repo's existing convention for intentional swallow-and-continue.
ruff check passes on all canonical files + tests; 30 affected tests green.
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