Decode named references case-sensitively

[rogerchappel]

Summary

• add regression coverage for exact uppercase aliases and undefined mixed/all-case spellings
• decode named references only when their case exactly matches a defined entity name
• document case-sensitive entity behavior and preservation of unknown spellings

Commits

• cfdbb2e test: cover case-sensitive named references
• cd2858c fix: decode named references case-sensitively
• 0977434 docs: define named reference case behavior

Verification

• npm ci --ignore-scripts --no-audit --no-fund
• focused named/numeric entity tests
• npm run release:check (43 tests, syntax, build, CLI smoke, package smoke, release contract)
• git diff --check origin/main...HEAD
• author and committer identities verified as Roger Chappel miscanalysis@gmail.com

[rogerchappel]

Automated merge note

Triage class: auto-merge

Summary: Preserves undefined mixed- or uppercase named HTML references while continuing to decode exact defined aliases and case-insensitive numeric references, with focused regression coverage and documentation (4 files, +9/-6).

Checks run: GitHub CI test — COMPLETED/SUCCESS; worker verification recorded npm ci --ignore-scripts --no-audit --no-fund, focused entity tests, npm run release:check (43 tests, syntax, build, CLI smoke, package smoke, release contract), and git diff --check. Final full diff, mergeability, branch protection, Roger Chappel author/committer identities, and head SHA re-verified.

Rebased/CI-repaired: No.

Verified head SHA: 0977434.