feat: add Compose self-host quickstart

[fazpu]

Summary

• add the typed MinIO object-store adapter and executable profiles/selfhost composition
• add a pinned, non-root Python 3.14 image plus a fresh-deployment Compose stack for PostgreSQL, MinIO, setup, API, and separate convert/structure workers
• add a parallel CI acceptance that proves real MinIO immutability, ingest state (convert/structure succeeded, chunk pending), and zero provider cost
• document the bounded pre-release workflow and record WP-0.4c completion

Scope boundary

This is deliberately a fresh single-deployment infrastructure skeleton. Authentication, later workers, full D74 restore readiness, published GHCR images, HA, backups, and hosted operations remain deferred to their owning release/cloud work.

Verification

• real local Compose build and fresh-volume bring-up
• /healthz and /recipes
• Markdown ingest through MinIO: 1|1|1 expected work-state proof and cost_ledger=0
• pinned MinIO rejects replacement at an existing key
• uv run pytest src/tests/adapters/test_minio_store.py -q --tb=short (4 passed)
• uv run ruff check src/
• uv run ruff format --check src/
• uv run pyright src/ --pythonversion 3.14
• uv run lint-imports (5 contracts kept)
• docs npm run typecheck && npm run build
• Grok 4.5 independent review: PASS; focused post-fix review: PASS

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
src/ultimate_memory/adapters
__init__.py					35-39, 44
src/ultimate_memory/adapters/selfhost
__init__.py					54
minio.py					123, 125, 136, 139-144, 177, 207, 219, 223, 245-247, 254
src/ultimate_memory/profiles
__init__.py					14-22
selfhost.py					3-32, 39-322
src/ultimate_memory/spine
forget.py
Project Total

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