Refactor scheduler and settings UI

migrations/029_drop_unused_qt_bom.sql

@@ -0,0 +1,50 @@
+-- Drop unused BOM storage introduced earlier but never adopted in runtime code.
+
+SET @fk_cfg_bom_exists := (
+    SELECT COUNT(*)
+    FROM information_schema.REFERENTIAL_CONSTRAINTS
+    WHERE CONSTRAINT_SCHEMA = DATABASE()
+      AND CONSTRAINT_NAME = 'fk_qt_configurations_bom'
+);
+SET @fk_cfg_bom_sql := IF(
+    @fk_cfg_bom_exists > 0,
+    'ALTER TABLE qt_configurations DROP FOREIGN KEY fk_qt_configurations_bom',
+    'SELECT 1'
+);
+PREPARE stmt_drop_cfg_bom_fk FROM @fk_cfg_bom_sql;
+EXECUTE stmt_drop_cfg_bom_fk;
+DEALLOCATE PREPARE stmt_drop_cfg_bom_fk;
+
+SET @idx_cfg_bom_exists := (
+    SELECT COUNT(*)
+    FROM information_schema.STATISTICS
+    WHERE TABLE_SCHEMA = DATABASE()
+      AND TABLE_NAME = 'qt_configurations'
+      AND INDEX_NAME = 'idx_qt_configurations_bom_id'
+);
+SET @idx_cfg_bom_sql := IF(
+    @idx_cfg_bom_exists > 0,
+    'ALTER TABLE qt_configurations DROP INDEX idx_qt_configurations_bom_id',
+    'SELECT 1'
+);
+PREPARE stmt_drop_cfg_bom_idx FROM @idx_cfg_bom_sql;
+EXECUTE stmt_drop_cfg_bom_idx;
+DEALLOCATE PREPARE stmt_drop_cfg_bom_idx;
+
+SET @col_cfg_bom_exists := (
+    SELECT COUNT(*)
+    FROM information_schema.COLUMNS
+    WHERE TABLE_SCHEMA = DATABASE()
+      AND TABLE_NAME = 'qt_configurations'
+      AND COLUMN_NAME = 'bom_id'
+);
+SET @col_cfg_bom_sql := IF(
+    @col_cfg_bom_exists > 0,
+    'ALTER TABLE qt_configurations DROP COLUMN bom_id',
+    'SELECT 1'
+);
+PREPARE stmt_drop_cfg_bom_col FROM @col_cfg_bom_sql;
+EXECUTE stmt_drop_cfg_bom_col;
+DEALLOCATE PREPARE stmt_drop_cfg_bom_col;
+
+DROP TABLE IF EXISTS qt_bom;

migrations/030_add_scheduler_runs.sql

@@ -0,0 +1,9 @@
+CREATE TABLE IF NOT EXISTS qt_scheduler_runs (
+    job_name VARCHAR(100) NOT NULL,
+    last_started_at DATETIME NULL,
+    last_finished_at DATETIME NULL,
+    last_status VARCHAR(20) NOT NULL DEFAULT 'idle',
+    last_error TEXT NULL,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    PRIMARY KEY (job_name)
+);