Create a new stage for your team. Stages represent steps in a sales, company, or contract pipeline.

Required Fields:

• name - Display name of the stage

Optional Fields:

• color - Hex color code (e.g., #3B82F6). Auto-assigned if omitted.
• icon - Icon name (e.g., flag)
• entityType - person (default), company, or contract
• parentId - Parent stage UUID (for sub-stages)
• position - Display order position (auto-assigned if omitted)
• active - Whether the stage is active (default: true)