refactor(backend): split monolithic migration into 7 goose files
001_init_schemas — extensions, schemas, uuid_v7 functions
002_core_tables — core.users, mime_types, object_types
003_data_tables — data.categories, tags, tag_rules, files, file_tag, pools, file_pool
004_acl_tables — acl.permissions
005_activity_tables — activity.action_types, sessions, file_views, pool_views, tag_uses, audit_log
006_indexes — all indexes across all schemas
007_seed_data — object_types and action_types reference rows
Each file has -- +goose Up / Down annotations; downs drop in reverse
dependency order.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>