Add incremental import support and tracking for database synchronization

inventory-server/db/config-schema.sql

@@ -169,4 +169,27 @@ ORDER BY
         ELSE 4
     END,
     c.name,
-    st.vendor; 
+    st.vendor;
+
+CREATE TABLE IF NOT EXISTS sync_status (
+    table_name VARCHAR(50) PRIMARY KEY,
+    last_sync_timestamp TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    last_sync_id BIGINT,
+    INDEX idx_last_sync (last_sync_timestamp)
+);
+
+CREATE TABLE IF NOT EXISTS import_history (
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    table_name VARCHAR(50) NOT NULL,
+    start_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    end_time TIMESTAMP NULL,
+    duration_seconds INT,
+    records_added INT DEFAULT 0,
+    records_updated INT DEFAULT 0,
+    is_incremental BOOLEAN DEFAULT FALSE,
+    status ENUM('running', 'completed', 'failed', 'cancelled') DEFAULT 'running',
+    error_message TEXT,
+    additional_info JSON,
+    INDEX idx_table_time (table_name, start_time),
+    INDEX idx_status (status)
+);