…#10994)

Aligns the dashboard widget docs with the product UI, which renamed the
"Add Time Grain" toolbar button and the "Time Grain" switcher widget to
"Time Granularity" (and grouped Filter / Time Granularity under an "Add
Controls" label). Renames the "Time grain switcher" heading (and its
#time-grain-switcher anchor → #time-granularity-switcher), the "Allowed
grains" / "Default grain" subsections, and all body copy across the
controls, widgets index, charts, and dashboard-agent pages.

Co-authored-by: Gleb Sologub <director@mentee.group>

The default row limit for workbook semantic queries was documented as
5,000; update it to 10,000 to match the current product default. The
adjustable maximum (50,000) is unchanged.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

The cross-domain redirect table (#11002) sent most legacy cube.dev/docs
URLs to non-existent docs.cube.dev pages — 386 of 509 destinations (76%)
returned 404, e.g. /product/data-modeling/reference/pre-aggregations went
to the dead /docs/data-modeling/reference/pre-aggregations instead of the
real /reference/data-modeling/pre-aggregations.

Root cause: build_old_site_redirects.py reused rewrite_links.PATH_REWRITES,
which describes an intermediate migration layout (/access-security,
/api-reference, /analytics tabs and /docs/data-modeling/reference/...) that
never shipped. Content was consolidated into the live tabs (admin, reference,
docs, recipes, embedding, configuration, cube-core).

Rewrite the generator to be content-driven and self-validating:
- Derive each destination by matching the old page's body text against the
  live Mintlify pages (new files were copied from old ones during migration,
  so prose is preserved). 319 old pages mapped.
- Pin ambiguous/consolidated/removed pages in an explicit OVERRIDES table,
  verified by hand against the real tree.
- Emit a redirect for every legacy alias and every canonical /product page,
  plus a /product/:path* catch-all so nothing 404s.
- Validate every destination against the on-disk Mintlify tree and exit
  non-zero if any would 404, so a broken table can't be committed silently.

Regenerated redirects-new-docs.json (509 -> 774 entries, all validated).
All 455 original alias sources remain covered. Live-checked the reported
pre-aggregations page (now 200, was 404) plus a 30-destination sample (all 200).

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>