Add hotel_location and met_office integrations

Two new schema-driven integrations for hvac's weather compensation
feature: hotel_location (lat/lon, plaintext config) and met_office
(encrypted api_key). Both surface automatically on the portal's
Integrations tab via the existing generic integration UI/routes — no
portal changes needed. Deliberately central here rather than hvac-local
so other apps can reuse the hotel's location later. Added a met_office
connection test (DataHub daily-forecast call) alongside the others.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/integrations/schema.js

@@ -52,6 +52,16 @@ export const INTEGRATIONS = {
     configFields: ['host', 'port'],
     secretFields: ['username', 'password'],
   },
+  hotel_location: {
+    name: 'Hotel Location',
+    configFields: ['latitude', 'longitude'],
+    secretFields: [],
+  },
+  met_office: {
+    name: 'Met Office DataHub',
+    configFields: [],
+    secretFields: ['api_key'],
+  },
 }
 
 export const MASKED = '••••••••'

src/routes/integrations.js

@@ -166,6 +166,18 @@ export async function integrationRoutes(app) {
         if (res.status === 401 || res.status === 403) throw new Error('Invalid Azure API key')
         if (!res.ok) throw new Error(`Azure returned ${res.status}`)
       }
+      else if (req.params.slug === 'met_office') {
+        if (!creds.api_key) throw new Error('Met Office API key required')
+        const { rows: [loc] } = await pool.query(`SELECT config FROM integrations WHERE slug = 'hotel_location'`)
+        const lat = loc?.config?.latitude || '51.5072'
+        const lon = loc?.config?.longitude || '-0.1276'
+        const res = await fetch(
+          `https://data.hub.api.metoffice.gov.uk/sitespecific/v0/point/daily?latitude=${lat}&longitude=${lon}`,
+          { headers: { apikey: creds.api_key }, signal: AbortSignal.timeout(8000) }
+        )
+        if (res.status === 401 || res.status === 403) throw new Error('Invalid Met Office API key')
+        if (!res.ok) throw new Error(`Met Office DataHub returned ${res.status}`)
+      }
       else if (req.params.slug === 'sambapos') {
         const errors = []
         // SQL test — SambaPOS uses MSSQL; host may be "server\INSTANCE"