Track the changes of the source override dictionary

[z4kn4fein]

Describe the purpose of your pull request

This PR contains the following:

• Introduces a new local dictionary override factory method:

  FlagOverrides LocalDictionary(IDictionary<string, object> dictionary, bool watchChanges, OverrideBehaviour overrideBehaviour)

  Where the watchChanges parameter indicates whether the SDK should rebuild the overrides upon each read to keep track of the source dictionary's changes.

Requirement checklist (only if applicable)

• [x] I have covered the applied changes with automated tests.
• [x] I have executed the full automated test set against my changes.
• [x] I have validated my changes against all supported platform versions.
• [x] I have read and accepted the contribution agreement.

[zoltan-david]

I think this should be triggered with the forceRefresh(). Don't you think?

[z4kn4fein]

I think this should be triggered with the forceRefresh(). Don't you think?

ForceRefresh() has no effect on the local overrides directly. It only refreshes the remote config, which is merged with the local overrides in some cases, but this has to work with the LocalOnly behavior as well.

[sonarcloud[bot]]

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