* fix: less FC gets for scan agg

Plus only get an immutable folder config.
This will help increase performance.
Removed internal helpers from the interface and test `StateSnapshot()`.

* fix: get FCs less for scan aggregator

Also don't enrich from git when getting feature flags, which is a hot path.

* fix: ensure scan summary always is updated at end of scans

* fix: don't enrich from Git when immutable FC

Shawky told me to do it!
Plus remove `CreateMinimalFCOnErr` and just rely on `CreateIfNotExist` to be simpler.

* fix: don't reset scan agg back to 0 anymore

It was breaking single file scans and failing tests.

* fix: less enriching from Git

Make more immutable folder configs.

* refactor: just use immutable FC for FFs

* refactor: use immutable FC for scan agg again

* fix: always use global fallback for configs

* fix: html setting for issueviewoption

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Co-authored-by: Abdelrahman Shawki Hassan <shawki.hassan@snyk.io>