Allow creating and updating tasks on the backend. (#2)

Create hurl tests along with the necessary api code to resolve them.

Reviewed-on: #2
Co-authored-by: Drew Galbraith <drew@tiramisu.one>
Co-committed-by: Drew Galbraith <drew@tiramisu.one>

backend/tests/api/tasks.hurl

@@ -0,0 +1,94 @@
+# Task API Tests
+
+# Test: Create a new task (POST /api/tasks)
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Test task",
+  "description": "A test task for the API"
+}
+
+HTTP 201
+[Captures]
+task_id: jsonpath "$.id"
+[Asserts]
+jsonpath "$.title" == "Test task"
+jsonpath "$.description" == "A test task for the API"
+jsonpath "$.status" == "todo"
+jsonpath "$.id" exists
+jsonpath "$.created_at" exists
+jsonpath "$.updated_at" exists
+
+# Test: Create a minimal task (only required fields)
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Minimal task"
+}
+
+HTTP 201
+[Captures]
+minimal_task_id: jsonpath "$.id"
+[Asserts]
+jsonpath "$.title" == "Minimal task"
+jsonpath "$.status" == "todo"
+jsonpath "$.description" == null
+
+# Test: Create task with invalid data (missing title)
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "description": "Task without title"
+}
+
+HTTP 422
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Create task with invalid priority
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Invalid priority task",
+  "priority": "This field does not exist."
+}
+
+HTTP 422
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Get a specific task by ID (GET /api/tasks/{id})
+GET {{host}}/api/tasks/{{task_id}}
+
+HTTP 200
+[Asserts]
+jsonpath "$.id" == "{{task_id}}"
+jsonpath "$.title" == "Test task"
+jsonpath "$.description" == "A test task for the API"
+jsonpath "$.status" == "todo"
+jsonpath "$.created_at" exists
+jsonpath "$.updated_at" exists
+
+# Test: Get a minimal task by ID
+GET {{host}}/api/tasks/{{minimal_task_id}}
+
+HTTP 200
+[Asserts]
+jsonpath "$.id" == "{{minimal_task_id}}"
+jsonpath "$.title" == "Minimal task"
+jsonpath "$.status" == "todo"
+jsonpath "$.description" == null
+
+# Test: Get non-existent task
+GET {{host}}/api/tasks/00000000-0000-0000-0000-000000000000
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Get task with invalid UUID format
+GET {{host}}/api/tasks/invalid-uuid
+
+HTTP 400
+[Asserts]
+jsonpath "$.error" exists