chore: add admin for observed taxa

ami/main/admin.py

@@ -57,6 +57,17 @@ class ProjectAdmin(admin.ModelAdmin[Project]):
 
     list_display = ("name", "priority", "active", "created_at", "updated_at")
 
+    # add action to update observed taxa for the project
+    @admin.action(description="Update observed taxa")
+    def update_observed_taxa(self, request: HttpRequest, queryset: QuerySet[Project]) -> None:
+        from ami.taxa.models import update_taxa_observed_for_project
+
+        for project in queryset:
+            update_taxa_observed_for_project(project)
+        self.message_user(request, f"Updated {queryset.count()} projects.")
+
+    actions = [update_observed_taxa]
+
 
 @admin.register(Deployment)
 class DeploymentAdmin(admin.ModelAdmin[Deployment]):