"""
Schema versioning for database migrations.

HOW TO USE:
- Bump SCHEMA_VERSION when making changes to database models
- This triggers an automatic full data reimport on next app startup

WHEN TO BUMP:
- Adding/removing columns in models.py
- Changing column types or constraints
- Modifying CSV column mappings in schemas.py
- Any change that requires fresh data import
"""

# Current schema version - increment when models change
SCHEMA_VERSION = 2

# Changelog for documentation
SCHEMA_CHANGELOG = {
    1: "Initial schema with School and SchoolResult tables",
    2: "Added pupil absence fields (reading, maths, gps, writing, science)",
}