fix(ses): preserve h1 elements — do not strip first heading

Songs always carries a # Song title line so stripping makes sense there,
but SES body structure is freeform and may use h1 deliberately.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pipelines/ses/README.md

@@ -10,7 +10,6 @@ Publishes SES light novel pages from `mikkeli/ses-light-novel` to `https://wiki.
 - YAML frontmatter parsing per [SCHEMA.md](SCHEMA.md)
 - `SES:` title prefix — all pages live in the SES MediaWiki namespace
 - Pandoc-based markdown → wikitext body rendering
-- First-line h1 stripping
 - Auto-generated banner (`{{Auto-generated|source=...|commit=<sha>}}`)
 - Category injection: `[[Category:SES]]` + `[[Category:SES:<type>]]` on every page; type from `type:` field, falling back to the file's parent directory name
 - Additional categories via optional `categories` list