fix: separate agent and memory endpoint namespaces

/memory/* - memory service (organized by project)
/agents/* - agent service (separate offering)

crates/mem-cli/src/handlers/agent_handler.rs

@@ -390,7 +390,7 @@ pub struct PromptResponse {
     pub created_at: String,
 }
 
-/// POST /memory/agents/{project_id}/prompts - Create agent prompt
+/// POST /agents/{id}/prompts - Create agent prompt
 pub async fn create_prompt_handler(
     req: HttpRequest,
     path: web::Path<String>,
@@ -462,7 +462,7 @@ pub struct MapRoleToPromptRequest {
     pub priority: Option<i32>,
 }
 
-/// POST /memory/agents/{project_id}/roles - Map role to prompt
+/// POST /agents/{id}/roles - Map role to prompt
 pub async fn map_role_to_prompt_handler(
     req: HttpRequest,
     path: web::Path<String>,
@@ -548,7 +548,7 @@ pub struct RolePromptsResponse {
     pub prompts: Vec<PromptResponse>,
 }
 
-/// GET /memory/agents/{project_id}/roles/{role_name}/prompts - Get prompts for role
+/// GET /agents/{id}/roles/{role_name}/prompts - Get prompts for role
 pub async fn get_role_prompts_handler(
     req: HttpRequest,
     path: web::Path<(String, String)>,