feat: Sprint 10 - Architecture docs, CI/CD, operational scripts

Phase 1 - Architecture Documentation:
- Add Architecture section with Mermaid flowchart to README
- Create docs/DATABASE_SCHEMA.md with full ERD

Phase 2 - CI/CD:
- Add CI badge to README
- Create .gitea/workflows/ci.yml for linting and tests
- Create .gitea/workflows/deploy-staging.yml
- Create .gitea/workflows/deploy-production.yml

Phase 3 - Operational Scripts:
- Create scripts/logs.sh for docker compose log following
- Create scripts/run-detached.sh with health check loop
- Create scripts/etl/toronto.sh for Toronto data pipeline
- Add Makefile targets: logs, run-detached, etl-toronto

Phase 4 - Runbooks:
- Create docs/runbooks/adding-dashboard.md
- Create docs/runbooks/deployment.md

Phase 5 - Hygiene:
- Create MIT LICENSE file

Phase 6 - Production:
- Add live demo link to README (leodata.science)

Closes #78, #79, #80, #81, #82, #83, #84, #85, #86, #87, #88, #89, #91

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/logs.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# scripts/logs.sh - Follow docker compose logs
+#
+# Usage:
+#   ./scripts/logs.sh           # All services
+#   ./scripts/logs.sh postgres  # Specific service
+#   ./scripts/logs.sh -n 100    # Last 100 lines
+
+set -euo pipefail
+
+SERVICE="${1:-}"
+EXTRA_ARGS="${@:2}"
+
+if [[ -n "$SERVICE" && "$SERVICE" != -* ]]; then
+    echo "Following logs for service: $SERVICE"
+    docker compose logs -f "$SERVICE" $EXTRA_ARGS
+else
+    echo "Following logs for all services"
+    docker compose logs -f $@
+fi