Add contractors by residence endpoint and Bruno API collection

- Add GET /contractors/by-residence/:residence_id/ endpoint
- Create comprehensive Bruno API collection (89 endpoints)
- Collection covers all API endpoints with Local and Dev environments

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

bruno-collections/casera-api/Task Completions/Create Completion.bru

@@ -0,0 +1,24 @@
+meta {
+  name: Create Completion
+  type: http
+  seq: 2
+}
+
+post {
+  url: {{api_url}}/task-completions/
+  body: json
+  auth: none
+}
+
+headers {
+  Authorization: Token {{auth_token}}
+}
+
+body:json {
+  {
+    "task_id": 1,
+    "notes": "Completed the task",
+    "actual_cost": 150.00,
+    "images": []
+  }
+}