feat: Add Phase 2 - Geographic Hierarchy and Health Scoring

Implements mesh intelligence with geo clustering, four-pillar health scoring,
and auto-naming regions from GPS data.

New: geo.py, mesh_health.py
Modified: config.py, main.py, router.py, configurator.py, config.example.yaml

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

meshai/config.py

@@ -176,6 +176,20 @@ class MeshSourceConfig:
     enabled: bool = True
 
 
+@dataclass
+class MeshIntelligenceConfig:
+    """Mesh intelligence and health scoring settings."""
+
+    enabled: bool = False
+    region_radius_miles: float = 40.0  # Radius for region clustering
+    locality_radius_miles: float = 8.0  # Radius for locality clustering
+    offline_threshold_hours: int = 24  # Hours before node considered offline
+    packet_threshold: int = 500  # Non-text packets per 24h to flag
+    battery_warning_percent: int = 20  # Battery level for warnings
+    infra_overrides: list[str] = field(default_factory=list)  # Node IDs to exclude from infra
+    region_labels: dict[str, str] = field(default_factory=dict)  # {suggested: custom}
+
+
 @dataclass
 class Config:
     """Main configuration container."""
@@ -192,6 +206,7 @@ class Config:
     meshmonitor: MeshMonitorConfig = field(default_factory=MeshMonitorConfig)
     knowledge: KnowledgeConfig = field(default_factory=KnowledgeConfig)
     mesh_sources: list[MeshSourceConfig] = field(default_factory=list)
+    mesh_intelligence: MeshIntelligenceConfig = field(default_factory=MeshIntelligenceConfig)
 
     _config_path: Optional[Path] = field(default=None, repr=False)