🧮 feat: Enhance Model Pricing Coverage and Pattern Matching (#10173)

* updated gpt5-pro

it is here and on openrouter
https://platform.openai.com/docs/models/gpt-5-pro

* feat: Add gpt-5-pro pricing
- Implemented handling for the new gpt-5-pro model in the getValueKey function.
- Updated tests to ensure correct behavior for gpt-5-pro across various scenarios.
- Adjusted token limits and multipliers for gpt-5-pro in the tokens utility files.
- Enhanced model matching functionality to include gpt-5-pro variations.

* refactor: optimize model pricing and validation logic

- Added new model pricing entries for llama2, llama3, and qwen variants in tx.js.
- Updated tokenValues to include additional models and their pricing structures.
- Implemented validation tests in tx.spec.js to ensure all models resolve correctly to pricing.
- Refactored getValueKey function to improve model matching and resolution efficiency.
- Removed outdated model entries from tokens.ts to streamline pricing management.

* fix: add missing pricing

* chore: update model pricing for qwen and gemma variants

* chore: update model pricing and add validation for context windows

- Removed outdated model entries from tx.js and updated tokenValues with new models.
- Added a test in tx.spec.js to ensure all models with pricing have corresponding context windows defined in tokens.ts.
- Introduced 'command-text' model pricing in tokens.ts to maintain consistency across model definitions.

* chore: update model names and pricing for AI21 and Amazon models

- Refactored model names in tx.js for AI21 and Amazon models to remove versioning and improve consistency.
- Updated pricing values in tokens.ts to reflect the new model names.
- Added comprehensive tests in tx.spec.js to validate pricing for both short and full model names across AI21 and Amazon models.

* feat: add pricing and validation for Claude Haiku 4.5 model

* chore: increase default max context tokens to 18000 for agents

* feat: add Qwen3 model pricing and validation tests

* chore: reorganize and update Qwen model pricing in tx.js and tokens.ts

---------

Co-authored-by: khfung <68192841+khfung@users.noreply.github.com>

api/server/services/Endpoints/agents/agent.js

@@ -143,7 +143,7 @@ const initializeAgent = async ({
   const agentMaxContextTokens = optionalChainWithEmptyCheck(
     maxContextTokens,
     getModelMaxTokens(tokensModel, providerEndpointMap[provider], options.endpointTokenConfig),
-    4096,
+    18000,
   );
 
   if (