fix(fonts): resolve observed family aliases deterministically

[jrusso1020]

What

Resolve production-observed font-family spellings that are currently renderable
but fail deterministic distributed font preflight:

• preserve ten authored family names while fetching verified,
  script-compatible Google families
• resolve Futura Std and MS Sans Serif through the existing bundled-font
  substitution path
• share the Google-fetch alias contract with lint so strict checks do not reject
  a family the producer can resolve

Unknown families still fail closed.

Why

font_unresolved is the largest current Hyperframes failure class. In a
fresh six-hour production sample it accounted for 49 completion failures. The
underlying exception logs included retries; deduplicating by workflow showed
28 affected workflows across 11 family spellings. This PR covers 22 of those
28 workflows:

• the original mappings cover 19 (MS Sans Serif, Noto Sans Greek,
  Pretendard, and Yantra Manav);
• the current-cohort extension covers 3 more (FredericktheGreat,
  Noto Serif VI, and Pyidaungsu).

The remaining Fira GO, Bungee Stencil, and Yantraavishkar spellings stay
fail-closed because substituting them would risk changing script coverage or
typography. inherit is a CSS cascade/parser issue and is intentionally left
for a separate syntax-aware fix.

The Google CSS2 endpoint does not serve several observed names verbatim even
though a deterministic script-compatible family exists. The producer therefore
reported a customer font_unresolved error for content it can safely render.

How

• add a distinct GOOGLE_FONT_FAMILY_ALIASES map in the browser-safe parsers
  package
• re-export it through composition/core for producer and lint consumers
• query the mapped Google family while emitting injected @font-face rules
  under the original authored family, so existing CSS selectors still match
• keep this separate from FONT_ALIAS_MAP, whose values mean bundled font
  substitutions
• recognize the same fetch aliases in font_family_without_font_face

The exact production axis matrix was verified against the official Google Fonts
CSS2 endpoint for every mapped family. Pyidaungsu maps to script-compatible
Noto Sans Myanmar; it is not metrically identical and must be included in
candidate screenshot/parity monitoring.

Test plan

• Unit tests added/updated
• Manual testing performed
• Documentation updated (not applicable)

Validation:

• producer deterministic-font focused suites: 35 passed
• lint font rule suite: 46 passed
• exact Google CSS2 production requests return HTTP 200 and WOFF2 faces for
  every new alias
• parser, lint, and producer typechecks passed
• pre-commit tracked-artifact, lint, format, static-analysis, typecheck, and
  commit-message hooks passed
• independent code review approved the original change and the current-cohort
  extension with no blockers