[recipes] Add wiki compiler orchestration recipe

[justfinethanku]

Summary

Adds a new recipes/wiki-compiler/ recipe that packages the newly-merged graph/wiki stack into one reproducible workflow.

• compile-wiki.mjs orchestrates entity extraction, typed-edge classification, entity wiki generation, topic wiki synthesis, and optional Gmail thread wiki backfill.
• README frames this as the compiled-on-demand wiki layer Nate described in the video: SQL stays the source of truth, wiki artifacts are regenerable outputs.
• Explicit contributor-credit section calls out Alan Shurafa's merged building blocks ([schemas] Entity extraction tables and extraction trigger #197, [integrations] Entity extraction worker #199, [schemas][recipes] Typed reasoning edges + Opus/Haiku classifier #208, [recipes] Entity wiki pages from knowledge graph #213, [recipes] Wiki synthesis + autobiography pipeline #222).
• Adds the recipe to recipes/README.md.

Why

The merged component PRs give OB1 all the underlying pieces, but there was no single top-level recipe a user could point at to say "this is the graph-backed compiled wiki workflow." This PR creates that composition layer.

Verification

• node --check recipes/wiki-compiler/compile-wiki.mjs
• node recipes/wiki-compiler/compile-wiki.mjs --help
• markdownlint-cli2 --config .github/.markdownlint.jsonc recipes/wiki-compiler/README.md recipes/README.md
• jq empty recipes/wiki-compiler/metadata.json