Add person email/phone, approve bulk select, and pending-queue digest

Capture optional contact fields on identify/approve, add Select All and
Approve Next 10 on User Identified Faces, and email admins when the
pending queue grows (ADMIN_NOTIFY_EMAIL via existing noreply SMTP).

backend/schemas/people.py

@@ -19,6 +19,8 @@ class PersonResponse(BaseModel):
     middle_name: Optional[str] = None
     maiden_name: Optional[str] = None
     date_of_birth: Optional[date] = None
+    email: Optional[str] = None
+    phone: Optional[str] = None
 
 
 class PersonCreateRequest(BaseModel):
@@ -31,6 +33,8 @@ class PersonCreateRequest(BaseModel):
     middle_name: Optional[str] = None
     maiden_name: Optional[str] = None
     date_of_birth: Optional[date] = None
+    email: Optional[str] = None
+    phone: Optional[str] = None
 
 
 class PeopleListResponse(BaseModel):
@@ -52,6 +56,8 @@ class PersonUpdateRequest(BaseModel):
     middle_name: Optional[str] = None
     maiden_name: Optional[str] = None
     date_of_birth: Optional[date] = None
+    email: Optional[str] = None
+    phone: Optional[str] = None
 
 
 class PersonWithFacesResponse(BaseModel):
@@ -65,6 +71,8 @@ class PersonWithFacesResponse(BaseModel):
     middle_name: Optional[str] = None
     maiden_name: Optional[str] = None
     date_of_birth: Optional[date] = None
+    email: Optional[str] = None
+    phone: Optional[str] = None
     face_count: int
     video_count: int