Enables Anthropic/Bedrock prompt caching for Claude routes via LiteLLM
cache_control_injection_points: system prompt + latest message everywhere,
plus tool_config on Bedrock Converse only (the sole route whose transform
consumes it; elsewhere it leaks as an unknown top-level field that native
Anthropic 400-rejects). Unmapped Bedrock Claude models run uncached instead
of crashing. Adds STRIX_PROMPT_CACHE opt-out (default on).
feat(inputs): implement logic for required tool choice based on model
test(inputs): add tests for force_required_tool_choice behavior
test(runner): update tests to include force_required_tool_choice in settings
Ahmed Allam