Enable CGO for migrate binary to support SQLite

Changes:
- Set CGO_ENABLED=1 for migrate build in .goreleaser.yaml
- Add sqlite-libs and musl runtime dependencies to Dockerfile.migrate

This fixes the migration error: 'Binary was compiled with CGO_ENABLED=0,
go-sqlite3 requires cgo to work'

.goreleaser.yaml

@@ -36,7 +36,7 @@ builds:
     main: ./cmd/migrate
     binary: migrate
     env:
-      - CGO_ENABLED=0
+      - CGO_ENABLED=1
     goos:
       - linux
       - darwin

Dockerfile.migrate

@@ -4,12 +4,14 @@ ARG TARGETARCH
 
 FROM alpine:latest
 
-# Install runtime dependencies
+# Install runtime dependencies (including CGO/SQLite dependencies)
 RUN apk add --no-cache \
     ca-certificates \
     postgresql-client \
     mysql-client \
     busybox-extras \
+    sqlite-libs \
+    musl \
     && update-ca-certificates
 
 # Create non-root user