Enable CGO for all GoHoarder binaries to support SQLite

Changes:
- Set CGO_ENABLED=1 for gohoarder main binary in .goreleaser.yaml
- Add sqlite-libs and musl to Dockerfile.server
- Add sqlite-libs and musl to Dockerfile.scanner

All Go binaries that interact with SQLite now have CGO enabled:
✅ gohoarder (main binary) - used by server and scanner
✅ migrate (migration tool)

Runtime containers include necessary C libraries:
✅ Dockerfile.server - SQLite runtime support
✅ Dockerfile.scanner - SQLite runtime support
✅ Dockerfile.migrate - SQLite runtime support

This fixes: 'Binary was compiled with CGO_ENABLED=0, go-sqlite3 requires cgo'

Dockerfile.server

@@ -4,10 +4,12 @@ ARG TARGETARCH
 
 FROM alpine:latest
 
-# Install runtime dependencies
+# Install runtime dependencies (including CGO/SQLite dependencies)
 RUN apk add --no-cache \
     ca-certificates \
     tzdata \
+    sqlite-libs \
+    musl \
     && update-ca-certificates
 
 # Create non-root user