Testing script:

```
from datalib import *
import time

now = time.time()

cve_storage = UCTCVEStorage()
cve_storage.load()

package_storage = UCTPackageStorage()
package_storage.load(filter_releases=['bionic', 'esm-apps/bionic', 'esm-infra/bionic'])

usn_storage = USNStorage()
usn_storage.load()

cve_storage.link_pkg_storage(package_storage)
usn_storage.link_pkg_storage(package_storage)
usn_storage.link_cve_storage(cve_storage)

later = time.time()
print('Total time: ', later - now)

gpac = package_storage.get_package('python-idna')
for version in gpac.source_versions:
    print(gpac, gpac.source_info[version]['release'], version)
    for binary in gpac.binaries[version]:
        print(f'  - {binary.name} {binary.version} {binary.arches}')

print()
print('------------------')
print('Showing CVE-2024-3651')
print('------------------')
cve = cve_storage.get_cve('CVE-2024-3651')
print(cve.id)
print(cve.description)
for entry in cve.pkg_entries:
    print('  -', entry.cve, entry.pkg, entry.release, entry.status, entry.note)

print()
print('------------------')
print('Loading jammy into the storage')
package_storage.load_release('jammy')
cve = cve_storage.get_cve('CVE-2024-3651')
print('------------------')
print('Showing CVE entries now')
for entry in cve.pkg_entries:
    print('  -', entry.cve, entry.pkg, entry.release, entry.status, entry.note)

print()
print('------------------')
print('Showing python-idna package')
print('------------------')
gpac = package_storage.get_package('python-idna')
for version in gpac.source_versions:
    print(gpac, gpac.source_info[version]['release'], version)
    for binary in gpac.binaries[version]:
        print(f'  - {binary.name} {binary.version} {binary.arches}')

print()
print('------------------')
print('Showing USNs for this CVE')
print('------------------')
usns = usn_storage.get_usns_by_cve(cve.id)
for usn in usns:
    print('USN',usn.id)
    print(usn.description)
    for cve in usn.cves:
        print(cve.id)
    print('Affected releases:', ','.join(list(usn.releases.keys())))
    for source_pkg in usn.package_fixed_versions:
        print(source_pkg.name)
        for fixed_version, release in usn.package_fixed_versions[source_pkg]:
            print('  - Fixed at', fixed_version, 'in', release)

print()
print('------------------')
print('Unloading jammy from the storage')
package_storage.unload_release('jammy')

print()
print('------------------')
print('Showing python-idna package')
print('------------------')
gpac = package_storage.get_package('python-idna')
for version in gpac.source_versions:
    print(gpac, gpac.source_info[version]['release'], version)
    for binary in gpac.binaries[version]:
        print(f'  - {binary.name} {binary.version} {binary.arches}')

cve = cve_storage.get_cve('CVE-2024-3651')

print()
print('------------------')
print('Showing CVE-2024-3651')
print('------------------')
for entry in cve.pkg_entries:
    print('  -', entry.cve, entry.pkg, entry.release, entry.status, entry.note)

print()
print('------------------')
print('Showing USNs for this CVE')
print('------------------')
usns = usn_storage.get_usns_by_cve(cve.id)
for usn in usns:
    print('USN',usn.id)
    print(usn.description)
    for cve in usn.cves:
        print(cve.id)
    print('Affected releases:', ','.join(list(usn.releases.keys())))
    for source_pkg in usn.package_fixed_versions:
        print(source_pkg.name)
        for fixed_version, release in usn.package_fixed_versions[source_pkg]:
            print('  - Fixed at', fixed_version, 'in', release) 
```