[FEAT] Improve fractional evaluation

[cupofcat]

• [FEAT] Harden Hashing Consistency And Add Support For Non-string Attributes in Fractional Evaluation
  • Create ADR for hashing consistency and non-string attributes
  • [CHORE] Extend provider-specific Gherkin tests to cover all the (edge) cases of hashing consistency and non-string attributes in fractional evaluations
• [FEAT] Bucketing improvements in fractional targeting
  • Create ADR to extend the fractional operator to support up to .001% distributions
• [FEAT] Support salting non-string attributes directly in JSON rules for fractional targeting
• [FEATURE] Nested fractional Argument Evaluation