Add links to Opportunity to match spec

Author: afm-umbra

src/stapi_fastapi/models/opportunity.py

@@ -4,6 +4,7 @@
 from geojson_pydantic.geometries import Geometry
 from pydantic import BaseModel, ConfigDict
 
+from stapi_fastapi.models.shared import Link
 from stapi_fastapi.types.datetime_interval import DatetimeInterval
 from stapi_fastapi.types.filter import CQL2Filter
 
@@ -22,6 +23,7 @@ class OpportunityRequest(OpportunityProperties):
 
 class Opportunity(Feature[Geometry, OpportunityProperties]):
     type: Literal["Feature"] = "Feature"
+    links: list[Link] = []
 
 
 class OpportunityCollection(FeatureCollection[Opportunity]):

src/stapi_fastapi/models/shared.py

@@ -1,4 +1,4 @@
-from typing import Optional
+from typing import Any, Optional, Union
 
 from pydantic import AnyUrl, BaseModel, ConfigDict
 
@@ -9,6 +9,8 @@ class Link(BaseModel):
     type: Optional[str] = None
     title: Optional[str] = None
     method: Optional[str] = None
+    headers: Optional[dict[str, Union[str, list[str]]]] = None
+    body: Any = None
 
     model_config = ConfigDict(extra="allow")