Adds docs/spec/X14-storage-minio.md — the domain spec + phased plan for
migrating binary document storage from the local data/ tree to the
already-deployed MinIO service (Coolify svc `minio`).
Captures: disk inventory, scattered file-I/O map (~8 services, no central
layer), DB path columns, MinIO deploy state, Paperclip = API-consumer only.
Defines 7 domain invariants (INV-STG1..7) and a 7-phase execution plan.
Chair decisions (2026-06-08): git-per-case keeps text/metadata + MinIO holds
binaries (INV-STG7); WORM Object-Lock on FINAL decisions only (INV-STG4);
internal Docker network for legal-ai↔MinIO.
Invariants: keeps G2 (single storage path replaces scattered I/O);
INV-STG1..7 new. Spec-only PR — no code/behavior change.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
