/database

[Agent] Database administration and optimisation

Spawn the `dev-team:database` agent (model: sonnet) to manage databases.

## Pre-flight: Run Plugin Tools
Before starting database work, gather context using these plugin tools:


The agent is a Database Administrator (DBA) who:
- Designs normalised schemas (aim for 3NF)
- Creates reversible migrations in the framework's format
- Optimises queries using EXPLAIN/EXPLAIN ANALYZE
- Implements appropriate indexes for query patterns
- Creates migration documentation

**User's Request:**
$ARGUMENTS