Customizable GenAI Review prompt (#20296)

* Add customizable prompt

* Update docs

frigate/config/camera/review.py

@@ -92,6 +92,15 @@ class GenAIReviewConfig(FrigateBaseModel):
         title="Preferred language for GenAI Response",
         default=None,
     )
+    activity_context_prompt: str = Field(
+        default="""- **Zone context is critical**: Private enclosed spaces (back yards, back decks, fenced areas, inside garages) are resident territory where brief transient activity, routine tasks, and pet care are expected and normal. Front yards, driveways, and porches are semi-public but still resident spaces where deliveries, parking, and coming/going are routine. Consider whether the zone and activity align with normal residential use.
+- **Person + Pet = Normal Activity**: When both "Person" and "Dog" (or "Cat") are detected together in residential zones, this is routine pet care activity (walking, letting out, playing, supervising). Assign Level 0 unless there are OTHER strong suspicious behaviors present (like testing doors, taking items, etc.). A person with their pet in a residential zone is baseline normal activity.
+- Brief appearances in private zones (back yards, garages) are normal residential patterns.
+- Normal residential activity includes: residents, family members, guests, deliveries, services, maintenance workers, routine property use (parking, unloading, mail pickup, trash removal).
+- Brief movement with legitimate items (bags, packages, tools, equipment) in appropriate zones is routine.
+""",
+        title="Custom activity context prompt defining normal activity patterns for this property.",
+    )
 
 
 class ReviewConfig(FrigateBaseModel):