fix: remove duplicate PipelineVersion index from M005 migration (already created by M007)

Author: TerrifiedBug

prisma/migrations/20260325000000_pipeline_version_index_and_user_relation/migration.sql

@@ -1,8 +1,8 @@
 -- AlterTable: make createdById nullable (required for SetNull on delete)
 ALTER TABLE "PipelineVersion" ALTER COLUMN "createdById" DROP NOT NULL;
 
--- CreateIndex: composite index for version history queries
-CREATE INDEX "PipelineVersion_pipelineId_version_idx" ON "PipelineVersion"("pipelineId", "version");
+-- CreateIndex: composite index already created by 20260325000000_add_pipeline_performance_indexes
+-- Skipped: CREATE INDEX "PipelineVersion_pipelineId_version_idx" (duplicate)
 
 -- AddForeignKey: link PipelineVersion.createdById → User.id
 ALTER TABLE "PipelineVersion" ADD CONSTRAINT "PipelineVersion_createdById_fkey" FOREIGN KEY ("createdById") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;