feat: filesystem blob storage

.env.example

@@ -14,19 +14,32 @@ DATABASE_URL=postgres://postgres:postgres@localhost:5432/pds
 # DATABASE_MIN_CONNECTIONS=10
 # DATABASE_ACQUIRE_TIMEOUT_SECS=30
 # =============================================================================
-# Blob Storage (S3-compatible)
+# Blob Storage
 # =============================================================================
-S3_ENDPOINT=http://localhost:9000
-AWS_REGION=us-east-1
-S3_BUCKET=pds-blobs
-AWS_ACCESS_KEY_ID=minioadmin
-AWS_SECRET_ACCESS_KEY=minioadmin
+# Backend: "filesystem" (default) or "s3"
+# BLOB_STORAGE_BACKEND=filesystem
+# For filesystem backend:
+BLOB_STORAGE_PATH=/var/lib/tranquil/blobs
+# For S3 backend:
+# S3_ENDPOINT=http://localhost:9000
+# AWS_REGION=us-east-1
+# S3_BUCKET=pds-blobs
+# AWS_ACCESS_KEY_ID=minioadmin
+# AWS_SECRET_ACCESS_KEY=minioadmin
 # =============================================================================
-# Backups (S3-compatible)
+# Backups
 # =============================================================================
-# Set to enable automatic repo backups to S3
-# BACKUP_S3_BUCKET=pds-backups
+# Enable/disable automatic repo backups
 # BACKUP_ENABLED=true
+# Backend: "filesystem" (default) or "s3"
+# BACKUP_STORAGE_BACKEND=filesystem
+# For filesystem backend:
+BACKUP_STORAGE_PATH=/var/lib/tranquil/backups
+# For S3 backend:
+# BACKUP_S3_BUCKET=pds-backups
+# Backup schedule and retention
+# BACKUP_RETENTION_COUNT=7
+# BACKUP_INTERVAL_SECS=86400
 # =============================================================================
 # Valkey (for caching and distributed rate limiting)
 # =============================================================================