🧹 chore: Remove Deprecated Gemini 2.0 Models & Fix Mistral-Large-3 Context Window (#12453)

* chore: remove deprecated Gemini 2.0 models from default models list

Remove gemini-2.0-flash-001 and gemini-2.0-flash-lite from the Google
default models array, as they have been deprecated by Google.

Closes #12444

* fix: add mistral-large-3 max context tokens (256k)

Add mistral-large-3 with 255000 max context tokens to the mistralModels
map. Without this entry, the model falls back to the generic
mistral-large key (131k), causing context window errors when using
tools with Azure AI Foundry deployments.

Closes #12429

* test: add mistral-large-3 token resolution tests and fix key ordering

Add test coverage for mistral-large-3 context token resolution,
verifying exact match, suffixed variants, and longest-match precedence
over the generic mistral-large key. Reorder the mistral-large-3 entry
after mistral-large to follow the file's documented convention of
listing newer models last for reverse-scan performance.

packages/api/src/utils/tokens.ts

@@ -72,6 +72,7 @@ const mistralModels = {
   'mistral-large-2402': 127500,
   'mistral-large-2407': 127500,
   'mistral-large': 131000,
+  'mistral-large-3': 255000,
   'mistral-saba': 32000,
   'ministral-3b': 131000,
   'ministral-8b': 131000,

packages/data-provider/src/config.ts

@@ -1238,9 +1238,6 @@ export const defaultModels = {
     'gemini-2.5-pro',
     'gemini-2.5-flash',
     'gemini-2.5-flash-lite',
-    // Gemini 2.0 Models
-    'gemini-2.0-flash-001',
-    'gemini-2.0-flash-lite',
   ],
   [EModelEndpoint.anthropic]: sharedAnthropicModels,
   [EModelEndpoint.openAI]: [