fix: remove duplicacao de comentario na troca de responsavel e corrige avatar

- Remove criacao automatica de comentario ao trocar responsavel (ja aparece na timeline)
- Adiciona migration removeAssigneeChangeComments para limpar comentarios antigos
- Adiciona campos description, type, options, answer ao schema de checklist no mapper
- Cria mutation updateAvatar no Convex para sincronizar avatar com snapshots
- Atualiza rota /api/profile/avatar para sincronizar com Convex ao adicionar/remover foto

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/lib/mappers/ticket.ts

@@ -86,6 +86,10 @@ const serverTicketSchema = z.object({
       z.object({
         id: z.string(),
         text: z.string(),
+        description: z.string().optional(),
+        type: z.enum(["checkbox", "question"]).optional(),
+        options: z.array(z.string()).optional(),
+        answer: z.string().optional(),
         done: z.boolean(),
         required: z.boolean().optional(),
         templateId: z.string().optional(),