Fix problems `type` in `reject-event` payload
### Description of the bug:
When zustelldienst rejects submissions automatically the `type` in the `problems` array doesn't match the regex pattern from the [Security Event token Schema](https://docs.fitko.de/fit-connect/docs/set-schema/overview).
### :x: Is:
* Problem `type` for `reject-reply` events automatically created by zustelldienst is `https://schema.fitko.de/fit-connect/submission-api/problems/automatic-reject-of-submission`
### :white_check_mark: Should:
* Problem `type` for `reject-reply` events automatically created by zustelldienst is `https://schema.fitko.de/fit-connect/events/problems/automatic-reject-of-submission`
### Environments:
all environments (DEV, TEST, STAGE, PROD)
### Additional Information:
* Open Code Bug: https://gitlab.opencode.de/fitko/feedback/-/issues/60
* SET schema: https://docs.fitko.de/fit-connect/docs/set-schema/overview (see `https://schema.fitko.de/fit-connect/events/reject-submission → problems → type → pattern`)
### Component:
* zustelldienst
### Contact persons including contact details:
* Open Code Bug: https://gitlab.opencode.de/fitko/feedback/-/issues/60
### Checklist:
- [ ] Add Severity label
- [x] Add team label
- [x] Related/affected issues/stories/epics linked and explained in the bug issue
- [ ] Creation of an automated test
- [ ] Bugfix deployed on DEV
- [ ] Bugfix tested on DEV
- [ ] Bugfix deployed on TEST
- [ ] Bugfix tested on TEST (possibly also by the connection project itself)
- [ ] Successful fix reported to Team Operations (Teams channel)
- [ ] Bugfix deployed on STAGE
- [ ] Bugfix tested on STAGE if necessary
- [ ] Bugfix deployed on PROD
- [ ] Bugfix tested on PROD (possibly also by the connection project itself)
- [ ] Final communication by Team Operations if necessary
- [ ] Internal documentation was checked and updated if necessary
- [ ] External documentation has been checked and updated if necessary
- [ ] Updated changelog if necessary
### Approach/Solution:
* Fix the test by asserting the correct `type` value: https://git.fitko.de/fit-connect/zustelldienst/blob/main/src/test/java/de/fiep/zustelldienst/securityeventtoken/service/EventLogWriterServiceTest.java#L210
* Fix the implementation and use the BASE_PATH for the PROBLEMS_URL - not the API_BASE_PATH
### Release version of the artifact:
issue