Fix/span type filter

[dinmukhamedm]

[!IMPORTANT] Enhance span_type filtering by implementing FromStr for SpanType, updating query handling, and modifying frontend SQL casting.

• Behavior:
  • Implement FromStr for SpanType in spans.rs to parse string inputs for span types.
  • Update add_filters_to_traces_query() in trace.rs to handle top_span_type using SpanType parsing.
  • Modify GET function in route.ts to cast span_type values correctly in SQL queries.
• Misc:
  • Add castType to FilterDef in modifiers.ts to support type casting in SQL filters.
  • Adjust ordinal values in seed.json for consistency.

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