Cache metadata all avoid caching draft

[DanielElisenberg]

• Fix so we don't cache draft versions
• Lru cache only works with hashable objects. Dataclass is not hashable if init is implemented or it is mutable. Made Version immutable and made a generate_from_string function to get around this so cache works. If we pass Version without these changes the app would crash

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[haraldsvik]

Lets test it!