feat: optimize Zabbix queries and enhance specialized device support

- Implement query optimization (reduced output, parameter skipping) to minimize Zabbix API traffic.

- Add indirect dependency handling: deviceType implies tags and state implies items.

- Move schema extensions to samples/extensions/ to clarify their role as samples.

- Enhance DistanceTrackerDevice with String time fields to support optional date portions.

- Ensure allDevices strictly filters by deviceType and populates the field in results.

- Refactor runAllRegressionTests mutation to use internal unique names and improve stability.

- Fix unnecessary Zabbix API calls for item preprocessing during template and host imports.

- Update documentation including cookbook recipes, test specifications, and optimization guides.

- Add extensive unit, integration, and regression tests covering all implemented changes.

- Update docker-compose.yml to mount the samples/ directory as a volume.

- Update IntelliJ .idea run configurations to reflect the new sample extension paths.

samples/extensions/location_tracker_devices.graphql

@@ -0,0 +1,59 @@
+"""
+DistanceTracker represents a device which can detect other devices around itself and estimate
+the distances, e.g. by using Bluetooth scanning technology and estimating the distance.
+"""
+type DistanceTrackerDevice implements Host & Device {
+    """Internal Zabbix ID of the device."""
+    hostid: ID!
+    """
+    Per convention a uuid is used as hostname to identify devices if they do not have a unique hostname.
+    """
+    host: String!
+    """Classification of the device."""
+    deviceType: String
+    """List of host groups this device belongs to."""
+    hostgroups: [HostGroup!]
+    """Visible name of the device."""
+    name: String
+    """Device configuration tags."""
+    tags: DeviceConfig
+    """Host inventory data."""
+    inventory: Inventory
+    """List of monitored items for this host."""
+    items: [ZabbixItem!]
+    """State of the distance tracker device."""
+    state: DistanceTrackerState
+}
+
+"""
+Represents the state of a distance tracker device.
+"""
+type DistanceTrackerState implements DeviceState {
+    """Operational data (telemetry)."""
+    operational: OperationalDeviceData
+    """Current business values (detected devices and distances)."""
+    current: DistanceTrackerValues
+}
+
+"""
+Aggregated information of devices detected around the tracker.
+"""
+type DistanceTrackerValues {
+    """
+    Start of time interval for the delivered device counting value.
+    """
+    timeFrom: String
+    """
+    End of time interval for the delivered device counting value.
+    """
+    timeUntil: String
+
+    """
+    Number of unique device keys detected between timeFrom and timeUntil.
+    """
+    count: Int
+    """
+    Detailed information about devices detected nearby.
+    """
+    distances: [SensorDistanceValue!]
+}