Gh-3350: Optimisations for federated POC

[tb06904]

Some minor optimisations and helpful functions for new federated store, changes include:

• Minimising stream API on small collections to save initialisation overhead.
• Using array/list data types where iteration performance is more important.
• Helpful operation to allow changing default graph IDs.
• Some tweaks hit the cache fewer times.
• Better shortcut logic on checks.

Related issue

• Resolve Investigate optimisations for federated POC #3350

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
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

[p29876]

Going to close this PR and split up the changes so we can progress
Some of the fixes are in #3358
The optimisations are to follow