Add relay activity

backend/spec/api.md

@@ -32,11 +32,13 @@ Notes:
 ## `async fn list_plans(...) -> Response`
 
 - Serves `GET /plans`
+- No authentication required
 - Return `data` is a list of plan structs from `Repo::list_plans`
 
 ## `async fn get_plan(...) -> Response`
 
 - Serves `GET /plans/:id`
+- No authentication required
 - Return `data` is a single plan struct matching `id`
 - If plan does not exist, return `404` with `code=not-found`
 
@@ -114,6 +116,12 @@ Notes:
 - If relay is a duplicate by subdomain, return a `422` with `code=subdomain-exists`
 - Return `data` is a single relay struct.
 
+## `async fn list_relay_activity(...) -> Response`
+
+- Serves `GET /relays/:id/activity`
+- Authorizes admin or relay owner
+- Return `data` is a list of activity structs from `repo.list_activity_for_relay`
+
 ## `async fn deactivate_relay(...) -> Response`
 
 - Serves `POST /relays/:id/deactivate`

backend/spec/repo.md

@@ -138,6 +138,11 @@ Notes:
 
 - Returns all activity occuring after `since` matching `tenant`
 
+## `pub fn list_activity_for_relay(&self, relay_id: &str) -> Result<Vec<Activity>>`
+
+- Returns all activity where `resource_type = 'relay'` and `resource_id = relay_id`
+- Ordered newest-first
+
 ## `pub fn get_relay_plan_sats(&self, plan: &str) -> Result<i64>`
 
 - Returns the monthly sats amount for a given plan id