Add models for ADR-validator boefje

[hugoboos]

Changes

This PR add's models used by the ADR-validator boefje.

Issue ticket number and link

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Checklist for author(s):

• This PR comes from a feature or hotfix branch, in line with our git branching strategy;
• This PR is "bite-sized" and only focuses on a single issue, problem, or feature;
• I am not reinventing the wheel: there is no high-quality library that already has this feature;
• I have changed the example .env files if I added, removed, or changed any config options, and I have informed others that they need to modify their .env files if required;
• I have performed a self-review of my own code;
• I have commented my code, particularly in hard-to-understand areas;
• I have made corresponding changes to the documentation, if necessary;
• I have written unit, integration, and end-to-end tests for the change that I made;

If a non-trivial PR:

• This PR is part of a milestone and has appropriate labels;
• This PR is properly linked to the project board (either directly or via an issue);
• I have added screenshots or some other proof that my code does what it is supposed to do;

## Checklist for functional reviewer(s):
- [ ] If a non-trivial PR: This PR is properly linked to an issue on the project board;
- [ ] I have checked out this branch, and successfully ran `make kat`;
- [ ] I have ran `make test-rf` and all end-to-end Robot Framework tests pass;
- [ ] I confirmed that the PR's advertised `feature` or `hotfix` works as intended;
- [ ] I confirmed that there are no unintended functional regressions in this branch;

### What works:
* _bullet point + screenshot (if useful) per tested functionality_

### What doesn't work:
* _bullet point + screenshot (if useful) per tested functionality_

### Bug or feature?:
* _bullet point + screenshot (if useful) if it is unclear whether something is a bug or an intended feature._

## Checklist for code reviewer(s):
- [ ] The code passes the CI tests and linters;
- [ ] The code does not bypass authentication or security mechanisms;
- [ ] The code does not introduce any dependency on a library that has not been properly vetted;
- [ ] The code does not violate Model-View-Template and our other architectural principles;
- [ ] The code contains docstrings, comments, and documentation where needed;
- [ ] The code prioritizes readability over performance where appropriate;
- [ ] The code conforms to our agreed coding standards.

Test

[github-actions]

File	Coverage
All files	67%	❌
bits/definitions.py	64%	❌
bits/runner.py	56%	❌
bits/https_availability/https_availability.py	93%	✅
bits/oois_in_headers/oois_in_headers.py	72%	❌
bits/spf_discovery/internetnl_spf_parser.py	55%	❌
bits/spf_discovery/spf_discovery.py	77%	✅
octopoes/api/api.py	89%	✅
octopoes/api/models.py	75%	✅
octopoes/api/router.py	56%	❌
octopoes/core/app.py	69%	❌
octopoes/core/service.py	58%	❌
octopoes/events/events.py	96%	✅
octopoes/events/manager.py	65%	❌
octopoes/models/__init__.py	80%	✅
octopoes/models/datetime.py	66%	❌
octopoes/models/exception.py	83%	✅
octopoes/models/origin.py	70%	❌
octopoes/models/path.py	99%	✅
octopoes/models/types.py	95%	✅
octopoes/models/ooi/certificate.py	95%	✅
octopoes/models/ooi/email_security.py	95%	✅
octopoes/models/ooi/findings.py	94%	✅
octopoes/models/ooi/network.py	97%	✅
octopoes/models/ooi/service.py	91%	✅
octopoes/models/ooi/software.py	71%	❌
octopoes/models/ooi/web.py	81%	✅
octopoes/models/ooi/dns/records.py	95%	✅
octopoes/models/ooi/dns/zone.py	82%	✅
octopoes/repositories/ooi_repository.py	40%	❌
octopoes/repositories/origin_parameter_repository.py	52%	❌
octopoes/repositories/origin_repository.py	52%	❌
octopoes/repositories/scan_profile_repository.py	45%	❌
octopoes/xtdb/client.py	39%	❌
octopoes/xtdb/query_builder.py	69%	❌
octopoes/xtdb/related_field_generator.py	73%	❌
tests/conftest.py	91%	✅

Minimum allowed coverage is 75%

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