Fix: missing DB columns (ml_score, capacity_hours) + CSS escape fix + SQL error logging

src/lib/db.ts

@@ -24,6 +24,12 @@ export async function query(text: string, params?: unknown[], userId?: string) {
     }
     const result = await client.query(text, params)
     return result
+  } catch (error) {
+    const msg = error instanceof Error ? error.message : String(error)
+    console.error(`[DB] query failed — ${msg}`)
+    console.error(`[DB] SQL: ${text}`)
+    if (params && params.length > 0) console.error(`[DB] Params:`, JSON.stringify(params))
+    throw error
   } finally {
     client.release()
   }