Enable Azure Function MCP endpoints for telemetry and action requests

.gitignore

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 # Bicep compiled files
-*.json
+infra/**/*.json
+!functions/**/*.json
 
 # Build artifacts
 dist/

functions/.funcignore

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+*.js.map
+*.ts
+.git*
+.vscode
+local.settings.json
+test
+tsconfig.json
+node_modules

functions/README.md

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+# Pi Chat Azure Functions
+
+This Azure Functions app provides MCP (Model Context Protocol) endpoints for the Pi Chat application.
+
+## Endpoints
+
+### GetTelemetry
+**POST** `/api/getTelemetry`
+
+Submits a telemetry request to the Service Bus "Telemetry" topic.
+
+**Request Body:**
+```json
+{
+  "sensorKey": "string",
+  "startDate": "2024-01-01T00:00:00Z",
+  "endDate": "2024-01-31T23:59:59Z"
+}
+```
+
+### SendAction
+**POST** `/api/sendAction`
+
+Submits an action request to the Service Bus "Action" topic.
+
+**Request Body:**
+```json
+{
+  "actionType": "string",
+  "actionSpec": "{\"key\": \"value\"}"
+}
+```
+
+### MCP Endpoints
+
+- **GET** `/api/mcp/info` - Returns MCP server information
+- **GET** `/api/mcp/tools` - Lists available MCP tools
+
+## Development
+
+### Prerequisites
+- Node.js 18.x or higher
+- Azure Functions Core Tools v4
+
+### Install Dependencies
+```bash
+npm install
+```
+
+### Build
+```bash
+npm run build
+```
+
+### Run Locally
+```bash
+npm start
+```
+
+### Environment Variables
+- `ServiceBusConnectionString` - Connection string for Azure Service Bus
+
+## Deployment
+
+The function app is deployed via Azure Bicep templates in the `infra` directory.

functions/host.json

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+{
+  "version": "2.0",
+  "logging": {
+    "applicationInsights": {
+      "samplingSettings": {
+        "isEnabled": true,
+        "maxTelemetryItemsPerSecond": 20
+      }
+    }
+  },
+  "extensionBundle": {
+    "id": "Microsoft.Azure.Functions.ExtensionBundle",
+    "version": "[4.*, 5.0.0)"
+  }
+}

functions/jest.config.js

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+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  roots: ['<rootDir>/test'],
+  testMatch: ['**/*.test.ts'],
+  collectCoverageFrom: [
+    'src/**/*.ts',
+    '!src/**/*.d.ts'
+  ]
+};

functions/local.settings.json.template

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+{
+  "IsEncrypted": false,
+  "Values": {
+    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
+    "FUNCTIONS_WORKER_RUNTIME": "node",
+    "ServiceBusConnectionString": "Endpoint=sb://your-namespace.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=your-key"
+  }
+}