fix hanging manual snapshot task

db/helpers.go

@@ -185,7 +185,6 @@ SELECT
   COALESCE(SUM(CASE WHEN "RamGB" IS NOT NULL THEN "RamGB" ELSE 0 END), 0) AS ram_total,
   COALESCE(SUM(CASE WHEN "ProvisionedDisk" IS NOT NULL THEN "ProvisionedDisk" ELSE 0 END), 0) AS disk_total
 FROM %s
-WHERE "IsPresent" = 'TRUE'
 `, table)
 
 	var totals SnapshotTotals
@@ -206,7 +205,6 @@ SELECT
 FROM (
 %s
 ) snapshots
-WHERE "IsPresent" = 'TRUE'
 `, unionQuery)
 
 	var totals SnapshotTotals
@@ -247,8 +245,7 @@ func EnsureSnapshotTable(ctx context.Context, dbConn *sqlx.DB, tableName string)
   "PoweredOn" TEXT,
   "SrmPlaceholder" TEXT,
   "VmUuid" TEXT,
-  "SnapshotTime" BIGINT NOT NULL,
-  "IsPresent" TEXT NOT NULL
+  "SnapshotTime" BIGINT NOT NULL
 );`, tableName)
 	default:
 		ddl = fmt.Sprintf(`CREATE TABLE IF NOT EXISTS %s (
@@ -272,8 +269,7 @@ func EnsureSnapshotTable(ctx context.Context, dbConn *sqlx.DB, tableName string)
   "PoweredOn" TEXT,
   "SrmPlaceholder" TEXT,
   "VmUuid" TEXT,
-  "SnapshotTime" BIGINT NOT NULL,
-  "IsPresent" TEXT NOT NULL
+  "SnapshotTime" BIGINT NOT NULL
 );`, tableName)
 	}
 
@@ -449,7 +445,6 @@ SELECT
     FROM snapshots s2
     WHERE s2."VmId" = agg."VmId"
       AND s2."Vcenter" = agg."Vcenter"
-      AND s2."IsPresent" = 'TRUE'
     ORDER BY s2."SnapshotTime" DESC
     LIMIT 1
   ) AS "ResourcePool",
@@ -818,6 +813,11 @@ func EnsureSummaryTable(ctx context.Context, dbConn *sqlx.DB, tableName string)
 		return err
 	}
 
+	// Best-effort: drop legacy IsPresent column if it exists.
+	if hasIsPresent, err := ColumnExists(ctx, dbConn, tableName, "IsPresent"); err == nil && hasIsPresent {
+		_, _ = dbConn.ExecContext(ctx, fmt.Sprintf(`ALTER TABLE %s DROP COLUMN "IsPresent"`, tableName))
+	}
+
 	indexes := []string{
 		fmt.Sprintf(`CREATE INDEX IF NOT EXISTS %s_vm_vcenter_idx ON %s ("VmId","Vcenter")`, tableName, tableName),
 		fmt.Sprintf(`CREATE INDEX IF NOT EXISTS %s_resourcepool_idx ON %s ("ResourcePool")`, tableName, tableName),