Add containerized services, observability, Wikimedia API guards, and ops docs

[artvandelay]

Motivation

• Provide production-ready service scaffolding for ingest/enrich/detect/report pipelines with containerization and observability.
• Protect the Wikimedia ingest path with rate-limiting and circuit-breaking to avoid outages and throttling.
• Add storage migrations and reliable backup/restore tooling to make data operations repeatable.
• Ship runbooks and configuration documentation so operators can restart services and perform backfills.

Description

• Add FastAPI service entrypoints: src/nlbt/services/ingest.py, enrich.py, detect.py, and report.py with structured logging and metrics integrated via src/nlbt/services/observability.py.
• Implement src/nlbt/services/wikimedia.py with a RateLimiter, CircuitBreaker, and WikimediaClient used by the ingest service to guard Wikimedia API calls.
• Add container Dockerfiles under services/*, database migrations and schema snapshots under storage/, and operational scripts scripts/db_migrate.sh, scripts/db_backup.sh, and scripts/db_restore.sh.
• Document configuration and runbooks in docs/configuration.md and docs/runbooks.md, update env.example, pyproject.toml (adds runtime deps), and reference the new materials from README.md.

Testing

• No automated tests were run against these changes.
• Files were validated by listing and viewing the added modules and scripts as part of the rollout (no unit/integration test execution).

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Codex Task