debug: Add logging to help diagnose provider loading issues

Add detailed logging to provider initialization to help debug why Chutes
and other providers aren't loading:
- Log all providers found in database
- Log API key env vars detected
- Log custom loader results with autoload status
- Log final loaded providers count

This will help identify if the issue is:
1. Database not loading correctly
2. Missing env vars
3. Custom loaders not being called
4. Providers being filtered out

opencode/packages/opencode/src/provider/provider.ts

@@ -824,7 +824,11 @@ export namespace Provider {
     } = {}
     const sdk = new Map<number, SDK>()
 
-    log.info("init")
+    log.info("init", { 
+      providerCount: Object.keys(database).length,
+      providers: Object.keys(database),
+      envKeys: Object.keys(env).filter(k => k.includes('API_KEY') || k.includes('TOKEN')).map(k => k.replace(/_API_KEY$/, '').toLowerCase())
+    })
 
     const configProviders = Object.entries(config.provider ?? {})
 
@@ -1009,13 +1013,17 @@ export namespace Provider {
     }
 
     for (const [providerID, fn] of Object.entries(CUSTOM_LOADERS)) {
-      if (disabled.has(providerID)) continue
+      if (disabled.has(providerID)) {
+        log.info("custom loader skipped (disabled)", { providerID })
+        continue
+      }
       const data = database[providerID]
       if (!data) {
         log.error("Provider does not exist in model list " + providerID)
         continue
       }
       const result = await fn(data)
+      log.info("custom loader result", { providerID, autoload: result?.autoload, hasEnv: data.env.some(e => env[e]) })
       if (result && (result.autoload || providers[providerID])) {
         if (result.getModel) modelLoaders[providerID] = result.getModel
         const opts = result.options ?? {}
@@ -1071,9 +1079,14 @@ export namespace Provider {
         continue
       }
 
-      log.info("found", { providerID })
+      log.info("found", { providerID, modelCount: Object.keys(provider.models).length })
     }
 
+    log.info("providers loaded", { 
+      total: Object.keys(providers).length,
+      connected: Object.keys(providers)
+    })
+
     return {
       models: languages,
       providers,