Add support for multiple GenAI Providers (#22144)

* GenAI client manager

* Add config migration

* Convert to roles list

* Support getting client via manager

* Cleanup

* Fix import issues

* Set model in llama.cpp config

* Clenaup

* Use config update

* Clenaup

* Add new title and desc

frigate/config/config.py

@@ -45,7 +45,7 @@ from .camera.audio import AudioConfig
 from .camera.birdseye import BirdseyeConfig
 from .camera.detect import DetectConfig
 from .camera.ffmpeg import FfmpegConfig
-from .camera.genai import GenAIConfig
+from .camera.genai import GenAIConfig, GenAIRoleEnum
 from .camera.motion import MotionConfig
 from .camera.notification import NotificationConfig
 from .camera.objects import FilterConfig, ObjectConfig
@@ -347,9 +347,9 @@ class FrigateConfig(FrigateBaseModel):
         default_factory=ModelConfig, title="Detection model configuration."
     )
 
-    # GenAI config
-    genai: GenAIConfig = Field(
-        default_factory=GenAIConfig, title="Generative AI configuration."
+    # GenAI config (named provider configs: name -> GenAIConfig)
+    genai: Dict[str, GenAIConfig] = Field(
+        default_factory=dict, title="Generative AI configuration (named providers)."
     )
 
     # Camera config
@@ -431,6 +431,18 @@ class FrigateConfig(FrigateBaseModel):
         # set notifications state
         self.notifications.enabled_in_config = self.notifications.enabled
 
+        # validate genai: each role (tools, vision, embeddings) at most once
+        role_to_name: dict[GenAIRoleEnum, str] = {}
+        for name, genai_cfg in self.genai.items():
+            for role in genai_cfg.roles:
+                if role in role_to_name:
+                    raise ValueError(
+                        f"GenAI role '{role.value}' is assigned to both "
+                        f"'{role_to_name[role]}' and '{name}'; each role must have "
+                        "exactly one provider."
+                    )
+                role_to_name[role] = name
+
         # set default min_score for object attributes
         for attribute in self.model.all_attributes:
             if not self.objects.filters.get(attribute):