Expose resource access explanation API

src/govoplan_access/backend/api/v1/admin_schemas.py

@@ -486,6 +486,15 @@ class AccessScopeExplanationItem(BaseModel):
     sources: list[AccessRoleSourceItem] = Field(default_factory=list)
 
 
+class AccessDecisionProvenanceItem(BaseModel):
+    kind: str
+    id: str | None = None
+    label: str | None = None
+    tenant_id: str | None = None
+    source: str | None = None
+    details: dict[str, object] = Field(default_factory=dict)
+
+
 class FunctionFactExplanationItem(BaseModel):
     source_module: str
     assignment_id: str
@@ -512,6 +521,14 @@ class UserAccessExplanationResponse(BaseModel):
     function_facts: list[FunctionFactExplanationItem] = Field(default_factory=list)
 
 
+class ResourceAccessExplanationResponse(BaseModel):
+    user: UserAdminItem
+    resource_type: str
+    resource_id: str
+    action: str
+    provenance: list[AccessDecisionProvenanceItem] = Field(default_factory=list)
+
+
 class UserListResponse(BaseModel):
     users: list[UserAdminItem]