infra: migrate deployment to Coolify with Garage S3

- Remove docker-compose files (Coolify manages services individually)
- Replace MinIO with Garage (S3-compatible, actively maintained)
- Add CI deploy job: build+push :develop image on every green Develop push
- Add Coolify webhook trigger for automatic redeployment
- Update README, .env.example, and storage references
- Rename migrate script to provider-agnostic name

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/migrate-images-to-s3.ts

@@ -1,5 +1,5 @@
 /**
- * One-time migration script: uploads/ -> MinIO (S3-compatible object storage)
+ * One-time migration script: uploads/ -> S3-compatible object storage
  *
  * Reads all image files from the local uploads/ directory and uploads each
  * to the S3 bucket via the storage service. Preserves original filenames
@@ -7,10 +7,10 @@
  *
  * Prerequisites:
  *   - S3_ENDPOINT, S3_ACCESS_KEY, S3_SECRET_KEY env vars must be set
- *   - The S3 bucket must exist (created by docker-compose or manually)
+ *   - The S3 bucket must exist
  *
  * Usage:
- *   bun run scripts/migrate-images-to-minio.ts
+ *   bun run scripts/migrate-images-to-s3.ts
  */
 
 import { readdir } from "node:fs/promises";