docs: update SPEC, BACKLOG, and README for v0.20–v0.23 changes
- SPEC.md: add Recipes + Recipe Ingredients tables, recipe_id FK on Meals,
External Calendars table, calendar_ref_id FK on Calendar Events, Recipes
module section, recipe integration in Meals module, external calendar
name/color badge and location display in Calendar module
- BACKLOG.md: add completed entries for ICS subscriptions, web/CLI installer,
bootstrap setup endpoint, Recipes module, external calendar names/colors,
event location, and Tasks/Dashboard improvements
- README.md: add Recipes to module list and Highlights section
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Ulas Kalayci
e5669fec24
