Add support for Claude 4.5 Sonnet and Claude 4.5 Haiku models (#331)

## Summary
This PR adds support for the newly released Claude 4.5 Sonnet and Claude
4.5 Haiku models from Anthropic.

## Changes
- **Added new model types**: `sonnet4.5` and `haiku4.5` to the
`modelTypeList`
- **Added model configurations** with the following specifications:
  - **Claude 4.5 Sonnet**: `anthropic.claude-sonnet-4-5-20250929-v1:0`
    - Input: $0.003 per 1K tokens
    - Output: $0.015 per 1K tokens
    - Cache read: $0.0003 per 1K tokens
    - Cache write: $0.00375 per 1K tokens
  - **Claude 4.5 Haiku**: `anthropic.claude-haiku-4-5-20251001-v1:0`
    - Input: $0.001 per 1K tokens
    - Output: $0.005 per 1K tokens
    - Cache read: $0.0001 per 1K tokens
    - Cache write: $0.00125 per 1K tokens

## Model Features
Both models are configured with:
- ✅ Reasoning support
- ✅ Interleaved thinking support
- ✅ Full cache support (system, message, tool)
- ✅ Complete tool choice support (any, auto, tool)
- Token limits consistent with Claude 4 generation (200K input, 64K/4K
output)

## Testing
- ✅ Build passes without errors
- ✅ All existing tests continue to pass
- ✅ No breaking changes to existing functionality

The pricing information is based on the official Anthropic pricing
documentation.

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Co-authored-by: remote-swe-app[bot] <123456+remote-swe-app[bot]@users.noreply.github.com>
Co-authored-by: Masashi Tomooka <[email protected]>

Author: 3 people

packages/agent-core/src/schema/model.ts

@@ -1,6 +1,8 @@
 import { z } from 'zod';
 
 export const modelTypeList = [
+  'sonnet4.5',
+  'haiku4.5',
   'sonnet4',
   'opus4.1',
   'opus4',
@@ -32,6 +34,28 @@ const modelConfigSchema = z.object({
 });
 
 export const modelConfigs: Record<ModelType, z.infer<typeof modelConfigSchema>> = {
+  'sonnet4.5': {
+    name: 'Claude 4.5 Sonnet',
+    modelId: 'anthropic.claude-sonnet-4-5-20250929-v1:0',
+    maxOutputTokens: 64_000,
+    maxInputTokens: 200_000,
+    cacheSupport: ['system', 'message', 'tool'],
+    reasoningSupport: true,
+    toolChoiceSupport: ['any', 'auto', 'tool'],
+    interleavedThinkingSupport: true,
+    pricing: { input: 0.003, output: 0.015, cacheRead: 0.0003, cacheWrite: 0.00375 },
+  },
+  'haiku4.5': {
+    name: 'Claude 4.5 Haiku',
+    modelId: 'anthropic.claude-haiku-4-5-20251001-v1:0',
+    maxOutputTokens: 64_000,
+    maxInputTokens: 200_000,
+    cacheSupport: ['system', 'message', 'tool'],
+    reasoningSupport: true,
+    toolChoiceSupport: ['any', 'auto', 'tool'],
+    interleavedThinkingSupport: true,
+    pricing: { input: 0.001, output: 0.005, cacheRead: 0.0001, cacheWrite: 0.00125 },
+  },
   'sonnet3.5v1': {
     name: 'Claude 3.5 Sonnet v1',
     modelId: 'anthropic.claude-3-5-sonnet-20240620-v1:0',