feat: add personal webhook notification backend #2678

Job	Run time
Linting and tests / Lint entire project	1m 18s
Linting and tests / Ensure database migrations drop columns the correct way	11s
Linting and tests / Lint database migrations	1m 3s
Linting and tests / mypy	1m 32s
Linting and tests / Lint, test, and build frontend	1m 37s
Linting and tests / Test technical documentation	23s
Linting and tests / Backend Tests: MySQL + RabbitMQ (RBAC enabled: True)	4m 23s
Linting and tests / Backend Tests: MySQL + RabbitMQ (RBAC enabled: False)	4m 36s
Linting and tests / Backend Tests: Plugin	41s
Linting and tests / Backend Tests: PostgreSQL + RabbitMQ (RBAC enabled: True)	4m 17s
Linting and tests / Backend Tests: SQLite + Redis (RBAC enabled: True)	3m 38s
Linting and tests / Backend Tests: PostgreSQL + RabbitMQ (RBAC enabled: False)	4m 13s
Linting and tests / Helm Chart Unit Tests	17s
Linting and tests / Backend Tests: SQLite + Redis (RBAC enabled: False)	3m 49s
Linting and tests / Unit tests - Migrators	25s
Snyk security scan / Snyk security scan	1m 22s
Linting and tests / Standard e2e tests (10.3.0) / Grafana: 10.3.0	8m 5s
Linting and tests / Standard e2e tests (11.2.0) / Grafana: 11.2.0	8m 7s
	49m 57s

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