Add project and task management with scheduling and notifications

Introduced `Project` and `Task` entities, along with supporting services, repositories, and APIs. Added features for project-based and household-level task management, including creation, listing, updates, and validation. Implemented scheduled notifications for tasks due tomorrow. Updated Flyway migrations, configuration files, and tests to support these functionalities.

src/test/http/hemhub-api.http

@@ -28,7 +28,7 @@ Authorization: Bearer {{token}}
   "name": "Familjen Andersson"
 }
 
-> {% client.global.set("householdId", JSON.parse(response.body).id); %}
+> {% client.global.set("householdId", response.body.id); %}
 
 ### 5. List my households
 GET http://localhost:8080/api/v1/households
@@ -53,3 +53,68 @@ Authorization: Bearer {{token}}
 ### 8. List members again (should now include Ulf)
 GET http://localhost:8080/api/v1/households/{{householdId}}/members
 Authorization: Bearer {{token}}
+
+### 9) Create project (OWNER only)
+POST http://localhost:8080/api/v1/projects
+Content-Type: application/json
+Authorization: Bearer {{token}}
+
+{
+  "householdId": "{{householdId}}",
+  "name": "Sovrumsrenovering",
+  "description": "Måla, golv, el"
+}
+
+> {% client.global.set("projectId", response.body.id); %}
+
+### 10) List projects in household
+GET http://localhost:8080/api/v1/households/{{householdId}}/projects
+Authorization: Bearer {{token}}
+
+### 11) Create task
+POST http://localhost:8080/api/v1/tasks
+Content-Type: application/json
+Authorization: Bearer {{token}}
+
+{
+  "projectId": "{{projectId}}",
+  "title": "Damsug soffan",
+  "priority": "LOW"
+}
+
+> {% client.global.set("taskId", response.body.id); %}
+
+### 12) List tasks
+GET http://localhost:8080/api/v1/projects/{{projectId}}/tasks
+Authorization: Bearer {{token}}
+
+### 13) Update task
+PATCH http://localhost:8080/api/v1/tasks/{{taskId}}
+Content-Type: application/json
+Authorization: Bearer {{token}}
+
+{
+  "status": "DONE"
+}
+
+### 14) Create a household-level task (no project)
+POST http://localhost:8080/api/v1/households/{{householdId}}/tasks
+Content-Type: application/json
+Authorization: Bearer {{token}}
+
+{
+  "title": "Buy milk",
+  "priority": "HIGH"
+}
+
+> {% client.global.set("taskId", response.body.id); %}
+
+### 15) List household-level tasks
+GET http://localhost:8080/api/v1/households/{{householdId}}/tasks
+Authorization: Bearer {{token}}
+
+### 16) My tasks due tomorrow
+GET http://localhost:8080/api/v1/tasks/due/tomorrow
+Authorization: Bearer {{token}}
+
+