feat: add inspect-facts function and memorize root facts

[k13gomez]

Summary

This PR enhances Clara Rules' introspection capabilities by adding memory tracking of root facts and a new inspect-facts function that provides comprehensive fact inspection.

Changes

Core Memory Enhancements

• Track unmatched root facts in working memory - Root elements (facts inserted directly by users) that were not matched are now stored separately from derived facts, enabling clear distinction between user-inserted and rule-generated facts
• Root facts are maintained at node ID 0 using the new ->RootElement helper function

New Inspection Capabilities

• New inspect-facts function (clara.tools.inspect/inspect-facts) - Returns a structured map containing:
  • :rules - map of rule IDs to their production nodes
  • :facts - sequence of all facts with metadata:
    • :fact - the actual fact value
    • :rule-id (optional) - ID of the rule that inserted the fact (absent for root facts)
    • :bindings (optional) - bindings used to insert the fact (absent for root facts)
    • :fact-types - sequence of fact types including ancestors
• Enhanced existing inspect function to include :root-facts in the inspection map
• Exposed fact-type and ancestors functions via metadata on get-alphas-fn for broader reuse

API Improvements

• Made inspection helper functions public for better composability:
• Renamed operation types for consistency: :insertion → :insert, :retraction → :retract
• Updated schema definitions: InspectionSchema → RulesInspectionSchema, added new FactsInspectionSchema

Test Coverage

Added comprehensive test coverage in clara.tools.test-inspect for the new inspect-facts function, validating both root and derived facts with their metadata.