Type Alias ToolCategory

ToolCategory: "core" | "advanced" | "osint" | "phase4" | "phase5"

Logical grouping for tools in the registry.

Category	Description
`core`	Fundamental EP data retrieval tools (MEPs, plenary, etc.)
`advanced`	Multi-step analytical tools (voting patterns, reports)
`osint`	Open-source intelligence analysis tools (influence, coalitions)
`phase4`	EP API v2 endpoint tools added in phase 4
`phase5`	Complete EP API v2 coverage added in phase 5