docs: Update README with correct API usage and comprehensive data list

Fix documentation issues:
- Change SdkConfig.Builder to use Int accountID instead of String API key
- Fix deviceData property access to use nested structure (deviceData.build.*)
- Update configuration options table with correct parameter names/types

Expand "Collected Data" section to document all signals:
- Device identifiers (storedID, deviceIDs)
- Device info (build, display, hardware)
- Subsystems (GPU, audio, sensors, cameras, codecs)
- System state (features, network, installation, settings, behavior)
- Additional signals (telephony, fonts, locale/timezone, WebView UA)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: oschwald

README.md

@@ -53,7 +53,7 @@ class MyApplication : Application() {
     override fun onCreate() {
         super.onCreate()
 
-        val config = SdkConfig.Builder("your-api-key")
+        val config = SdkConfig.Builder(123456)  // Your MaxMind account ID
             .enableLogging(BuildConfig.DEBUG)
             .build()
 
@@ -109,27 +109,27 @@ Collect device data without sending:
 
 ```kotlin
 val deviceData = DeviceTracker.getInstance().collectDeviceData()
-println("Device: ${deviceData.manufacturer} ${deviceData.model}")
+println("Device: ${deviceData.build.manufacturer} ${deviceData.build.model}")
 ```
 
 ## Configuration Options
 
 ### SdkConfig.Builder
 
 ```kotlin
-val config = SdkConfig.Builder("your-api-key")
+val config = SdkConfig.Builder(123456)              // Your MaxMind account ID
     .serverUrl("https://custom-server.com/api")  // Optional: Custom server URL
     .enableLogging(true)                          // Optional: Enable debug logging
     .collectionInterval(60_000)                   // Optional: Auto-collect every 60 seconds
     .build()
 ```
 
-| Option | Type | Default | Description |
-|--------|------|---------|-------------|
-| `apiKey` | String | *required* | Your MaxMind API key |
-| `serverUrl` | String | `https://device-api.maxmind.com/v1` | MaxMind API endpoint |
-| `enableLogging` | Boolean | `false` | Enable debug logging |
-| `collectionIntervalMs` | Long | `0` | Auto-collection interval (0 = disabled) |
+| Builder Method | Type | Default | Description |
+|----------------|------|---------|-------------|
+| `Builder(accountID)` | Int | *required* | Your MaxMind account ID |
+| `.serverUrl(url)` | String | Default servers | Custom server URL |
+| `.enableLogging(enabled)` | Boolean | `false` | Enable debug logging |
+| `.collectionInterval(ms)` | Long | `0` | Auto-collection interval in milliseconds (0 = disabled) |
 
 ## Permissions
 
@@ -142,17 +142,37 @@ The SDK requires the following permissions (automatically included):
 
 ## Collected Data
 
-The SDK collects the following device information:
-
-- **Device ID**: Optional unique identifier
-- **Manufacturer**: Device manufacturer (e.g., "Samsung", "Google")
-- **Model**: Device model name
-- **Brand**: Device brand name
-- **OS Version**: Android version
-- **SDK Version**: Android SDK/API level
-- **Screen Resolution**: Display resolution
-- **Screen Density**: Display density
-- **Timestamp**: Collection timestamp
+The SDK collects comprehensive device fingerprinting data:
+
+### Device Identifiers
+- **Stored ID**: Server-generated persistent ID (similar to browser cookies)
+- **Device IDs**: MediaDRM ID, Android ID (where available)
+
+### Device Info
+- **Build**: Manufacturer, model, brand, device, product, board, hardware, OS version, SDK version, security patch, supported ABIs
+- **Display**: Resolution, density, refresh rate, HDR capabilities
+- **Hardware**: CPU cores, total memory, total storage
+
+### Subsystems
+- **GPU**: Renderer, vendor, GL version, extensions
+- **Audio**: Output sample rate, frames per buffer
+- **Sensors**: Full list with type, vendor, max range
+- **Cameras**: IDs, facing, physical sensor size, supported resolutions, focal lengths
+- **Codecs**: Available audio/video codecs with details
+
+### System State
+- **System Features**: All available `PackageManager.FEATURE_*` values
+- **Network**: Connection type, metered status, WiFi info
+- **Installation**: First install time, last update, installer package, version code/name
+- **Settings**: Screen timeout, developer settings, animator scale, boot count
+- **Behavior**: Enabled keyboards, accessibility services
+
+### Additional Signals
+- **Telephony**: Network operator, SIM state, phone type
+- **Fonts**: Available system fonts (helps identify device/ROM)
+- **Locale/Timezone**: Language, country, timezone with DST offset
+- **WebView User Agent**: Default WebView user agent string
+- **Timestamp**: Collection time
 
 All data collection respects user privacy and Android security policies.