fix: maxCompletionTokens Implementation for All Providers (#1938)

* Update LLM providers and constants

- Updated constants in app/lib/.server/llm/constants.ts
- Modified stream-text functionality in app/lib/.server/llm/stream-text.ts
- Updated Anthropic provider in app/lib/modules/llm/providers/anthropic.ts
- Modified GitHub provider in app/lib/modules/llm/providers/github.ts
- Updated Google provider in app/lib/modules/llm/providers/google.ts
- Modified OpenAI provider in app/lib/modules/llm/providers/openai.ts
- Updated LLM types in app/lib/modules/llm/types.ts
- Modified API route in app/routes/api.llmcall.ts

* Fix maxCompletionTokens Implementation for All Providers

 - Cohere: Added maxCompletionTokens: 4000 to all 10 static models
  - DeepSeek: Added maxCompletionTokens: 8192 to all 3 static models
  - Groq: Added maxCompletionTokens: 8192 to both static models
  - Mistral: Added maxCompletionTokens: 8192 to all 9 static models
  - Together: Added maxCompletionTokens: 8192 to both static models

  - Groq: Fixed getDynamicModels to include maxCompletionTokens: 8192
  - Together: Fixed getDynamicModels to include maxCompletionTokens: 8192
  - OpenAI: Fixed getDynamicModels with proper logic for reasoning models (o1: 16384, o1-mini: 8192) and standard models

app/lib/modules/llm/providers/groq.ts

@@ -17,7 +17,13 @@ export default class GroqProvider extends BaseProvider {
      * Essential fallback models - only the most stable/reliable ones
      * Llama 3.1 8B: 128k context, fast and efficient
      */
-    { name: 'llama-3.1-8b-instant', label: 'Llama 3.1 8B', provider: 'Groq', maxTokenAllowed: 128000 },
+    {
+      name: 'llama-3.1-8b-instant',
+      label: 'Llama 3.1 8B',
+      provider: 'Groq',
+      maxTokenAllowed: 128000,
+      maxCompletionTokens: 8192,
+    },
 
     // Llama 3.3 70B: 128k context, most capable model
     {
@@ -25,6 +31,7 @@ export default class GroqProvider extends BaseProvider {
       label: 'Llama 3.3 70B',
       provider: 'Groq',
       maxTokenAllowed: 128000,
+      maxCompletionTokens: 8192,
     },
   ];
 
@@ -62,6 +69,7 @@ export default class GroqProvider extends BaseProvider {
       label: `${m.id} - context ${m.context_window ? Math.floor(m.context_window / 1000) + 'k' : 'N/A'} [ by ${m.owned_by}]`,
       provider: this.name,
       maxTokenAllowed: Math.min(m.context_window || 8192, 16384),
+      maxCompletionTokens: 8192,
     }));
   }