* fix(memory-wiki): preserve human notes block on source re-ingest
Re-ingesting an existing source regenerated the page with an empty
wrote inside the human-managed markers. This broke the documented
contract that human note blocks are preserved, and diverged from the
synthesis and chatgpt-import writers that already preserve the block.
When a source page already exists, read it and re-inject its human Notes
block before writing. The block is located by scanning past the fenced
the content, then taking the first human start marker and the last end
marker, so the whole Notes block is preserved verbatim even when the
source content or the note text contains the markers or Markdown
headings. The same preservation is applied to writeImportedSourcePage so
the bridge and unsafe-local source-update writers keep notes too. New
page creation is unchanged.
Adds regressions for plain re-ingest, marker text in source content,
marker text inside the note, a heading inside the note, and an imported
source page update.
* fix(memory-wiki): preserve notes on CRLF source pages
0ec12df245