quotes: rename AE-2026-001 source + PDF to match quote ID
quote.{tex,pdf} -> AE-2026-001.{tex,pdf}; permalink macros and
README updated to reference the new filenames. Future quotes
follow the same naming — source and built PDF are always named
after the quote ID.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>