Add deep-dive documentation for all 7 MCP servers

One document per server, covering architecture, database schema,
every tool with code snippets, key patterns, and cross-extension
integration points:

- 00-core-mcp-server.md: Edge Function, HTTP transport, 4 tools
- 01-household-knowledge-server.md: 2 tables, 5 tools, JSONB patterns
- 02-home-maintenance-server.md: DB trigger for time-bridging
- 03-family-calendar-server.md: Recurring events, 6 tools
- 04-meal-planning-server.md: Main + shared server, household RLS
- 05-professional-crm-server.md: Cross-extension thought linking
- 06-job-hunt-pipeline-server.md: 5 tables, 8 tools, nested queries

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: az9713