chore: implement pagination for work item relation definitions endpoint

Author: akhil-vamshi-konam

plane/api/work_item_relation_definitions.py

@@ -2,6 +2,7 @@
 
 from ..models.work_item_relation_definitions import (
     CreateWorkItemRelationDefinition,
+    PaginatedWorkItemRelationDefinitionResponse,
     UpdateWorkItemRelationDefinition,
     WorkItemRelationDefinition,
 )
@@ -19,25 +20,33 @@ def list(
         workspace_slug: str,
         is_default: bool | None = None,
         is_active: bool | None = None,
-    ) -> list[WorkItemRelationDefinition]:
-        """List all work item relation definitions in the workspace.
+        per_page: int | None = None,
+        cursor: str | None = None,
+    ) -> PaginatedWorkItemRelationDefinitionResponse:
+        """List work item relation definitions in the workspace.
 
         Args:
             workspace_slug: The workspace slug identifier
             is_default: Optional filter by default status
             is_active: Optional filter by active status
+            per_page: Number of results per page (default 100)
+            cursor: Pagination cursor from a previous response's next_cursor
         """
         params: dict[str, Any] = {}
         if is_default is not None:
             params["is_default"] = str(is_default).lower()
         if is_active is not None:
             params["is_active"] = str(is_active).lower()
+        if per_page is not None:
+            params["per_page"] = per_page
+        if cursor is not None:
+            params["cursor"] = cursor
 
         response = self._get(
             f"{workspace_slug}/work-item-relation-definitions/",
             params=params if params else None,
         )
-        return [WorkItemRelationDefinition.model_validate(item) for item in response]
+        return PaginatedWorkItemRelationDefinitionResponse.model_validate(response)
 
     def create(
         self, workspace_slug: str, data: CreateWorkItemRelationDefinition

plane/models/work_item_relation_definitions.py

@@ -2,6 +2,8 @@
 
 from pydantic import BaseModel, ConfigDict
 
+from .pagination import PaginatedResponse
+
 
 class WorkItemRelationDefinition(BaseModel):
     """Work item relation definition response model."""
@@ -47,3 +49,11 @@ class UpdateWorkItemRelationDefinition(BaseModel):
     is_active: bool | None = None
     color: str | None = None
     sort_order: float | None = None
+
+
+class PaginatedWorkItemRelationDefinitionResponse(PaginatedResponse):
+    """Paginated response for work item relation definitions."""
+
+    model_config = ConfigDict(extra="allow", populate_by_name=True)
+
+    results: list[WorkItemRelationDefinition]