fix: 镜像纳入 spark-seed，migrate 忽略已删列导致的 1054

EOF

Co-authored-by: Cursor <cursoragent@cursor.com>

Dockerfile

@@ -12,6 +12,7 @@ ENV TZ=Asia/Shanghai
 WORKDIR /app
 COPY bin/linux_amd64/spark-server /usr/local/bin/spark-server
 COPY bin/linux_amd64/spark-migrate /usr/local/bin/spark-migrate
+COPY bin/linux_amd64/spark-seed /usr/local/bin/spark-seed
 COPY migrations /app/migrations
 RUN mkdir -p /app/logs && chown -R spark:spark /app
 USER spark

cmd/migrate/main.go

@@ -126,6 +126,7 @@ func ignorableDDL(err error) bool {
 	switch me.Number {
 	case 1050, // table already exists
 		1051, // unknown table
+		1054, // unknown column (later migration dropped it; comment-only MODIFY is obsolete)
 		1060, // duplicate column
 		1061, // duplicate key name
 		1091, // can't drop; check that column/key exists