chore: import upstream snapshot with attribution

examples/azure/comparison/README.md

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+# azure/comparison (Azure Model Comparison)
+
+This example demonstrates how to compare models from different providers on Azure AI Foundry, including OpenAI, Anthropic Claude, Meta Llama, and Mistral.
+
+You can run this example with:
+
+```bash
+npx promptfoo@latest init --example azure/comparison
+cd azure/comparison
+```
+
+## Setup
+
+1. Deploy models from different providers in Azure AI Foundry
+2. Set your environment variables:
+
+```bash
+export AZURE_API_KEY=your-api-key
+# Set apiHost in promptfooconfig.yaml for each provider's deployment
+```
+
+## Models Compared
+
+| Provider  | Model                                    | Label         |
+| --------- | ---------------------------------------- | ------------- |
+| OpenAI    | `gpt-5.1`                                | gpt-5.1       |
+| Anthropic | `claude-sonnet-4-6`                      | claude-sonnet |
+| Meta      | `Llama-4-Maverick-17B-128E-Instruct-FP8` | llama-4       |
+| Mistral   | `Mistral-Large-2411`                     | mistral-large |
+
+## Running the Example
+
+```bash
+npx promptfoo@latest eval
+npx promptfoo@latest view
+```
+
+## Customization
+
+Modify `promptfooconfig.yaml` to:
+
+- Add or remove models
+- Change test questions
+- Adjust evaluation criteria
+- Compare cost vs performance
+
+## Use Cases
+
+- Benchmark different models on your specific tasks
+- Evaluate cost-effectiveness across providers
+- Find the best model for your use case
+- A/B test model updates
+
+## Documentation
+
+- [Azure Provider Documentation](https://promptfoo.dev/docs/providers/azure/)
+- [Azure AI Foundry](https://azure.microsoft.com/en-us/products/ai-services/ai-foundry/)

examples/azure/comparison/promptfooconfig.yaml

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+# yaml-language-server: $schema=https://promptfoo.dev/config-schema.json
+description: Azure model comparison
+
+prompts:
+  - |
+    You are a helpful assistant. Answer the following question concisely and accurately.
+
+    Question: {{question}}
+
+providers:
+  # OpenAI GPT-5.1 (Latest flagship)
+  - id: azure:chat:gpt-5.1
+    label: gpt-5.1
+    config:
+      apiHost: 'your-resource.openai.azure.com'
+      max_tokens: 1024
+      temperature: 0.7
+
+  # Anthropic Claude Sonnet 4.6
+  - id: azure:chat:claude-sonnet-4-6
+    label: claude-sonnet
+    config:
+      apiHost: 'your-deployment.services.ai.azure.com'
+      apiVersion: '2025-04-01-preview'
+      max_tokens: 1024
+      temperature: 0.7
+
+  # Meta Llama 4 Maverick
+  - id: azure:chat:Llama-4-Maverick-17B-128E-Instruct-FP8
+    label: llama-4
+    config:
+      apiHost: 'your-deployment.services.ai.azure.com'
+      apiVersion: '2025-04-01-preview'
+      max_tokens: 1024
+      temperature: 0.7
+
+  # Mistral Large
+  - id: azure:chat:Mistral-Large-2411
+    label: mistral-large
+    config:
+      apiHost: 'your-deployment.services.ai.azure.com'
+      apiVersion: '2025-04-01-preview'
+      max_tokens: 1024
+      temperature: 0.7
+
+tests:
+  - vars:
+      question: What are the main differences between machine learning and deep learning?
+    assert:
+      - type: llm-rubric
+        value: Accurately explains the relationship and differences
+      - type: contains-any
+        value: ['neural network', 'subset', 'feature']
+
+  - vars:
+      question: Explain the concept of recursion in programming with a simple example.
+    assert:
+      - type: llm-rubric
+        value: Provides a clear explanation with a working example
+      - type: contains-any
+        value: ['base case', 'function', 'itself']
+
+  - vars:
+      question: What is the difference between REST and GraphQL APIs?
+    assert:
+      - type: llm-rubric
+        value: Accurately compares both API paradigms
+      - type: contains-any
+        value: ['endpoint', 'query', 'schema']
+
+  - vars:
+      question: How does HTTPS encryption work?
+    assert:
+      - type: llm-rubric
+        value: Explains the encryption process accurately
+      - type: contains-any
+        value: ['TLS', 'SSL', 'certificate', 'handshake']