Add RAM usage in GB and swap metrics to agent, server, UI and CSV export

server/database.py

@@ -39,10 +39,37 @@ def run_migrations():
                 conn.execute(text("ALTER TABLE audit_log ADD COLUMN username TEXT"))
                 conn.commit()
 
-    # Heartbeat: add sessions column if missing
+    # Heartbeat: add missing columns
     if "heartbeats" in insp.get_table_names():
         hb_cols = {c["name"] for c in insp.get_columns("heartbeats")}
-        if "sessions" not in hb_cols:
-            with engine.connect() as conn:
-                conn.execute(text("ALTER TABLE heartbeats ADD COLUMN sessions TEXT"))
-                conn.commit()
+        new_hb_cols = [
+            ("sessions", "TEXT"),
+            ("ram_used_gb", "REAL"),
+            ("ram_available_gb", "REAL"),
+            ("swap_total_gb", "REAL"),
+            ("swap_used_gb", "REAL"),
+            ("swap_free_gb", "REAL"),
+            ("swap_percent", "REAL"),
+        ]
+        with engine.connect() as conn:
+            for col, col_type in new_hb_cols:
+                if col not in hb_cols:
+                    conn.execute(text(f"ALTER TABLE heartbeats ADD COLUMN {col} {col_type}"))
+            conn.commit()
+
+    # Computer: add missing columns
+    if "computers" in insp.get_table_names():
+        pc_cols = {c["name"] for c in insp.get_columns("computers")}
+        new_pc_cols = [
+            ("current_ram_used_gb", "REAL"),
+            ("current_ram_available_gb", "REAL"),
+            ("current_swap_total_gb", "REAL"),
+            ("current_swap_used_gb", "REAL"),
+            ("current_swap_free_gb", "REAL"),
+            ("current_swap_percent", "REAL"),
+        ]
+        with engine.connect() as conn:
+            for col, col_type in new_pc_cols:
+                if col not in pc_cols:
+                    conn.execute(text(f"ALTER TABLE computers ADD COLUMN {col} {col_type}"))
+            conn.commit()