refactor(schema): rename orchestrator-sisyphus to atlas

Update schema definitions, types, and integrations to use 'atlas' instead of 'orchestrator-sisyphus'. Includes schema regeneration and test updates.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/config/schema.ts

@@ -26,7 +26,7 @@ export const BuiltinAgentNameSchema = z.enum([
   "multimodal-looker",
   "Metis (Plan Consultant)",
   "Momus (Plan Reviewer)",
-  "orchestrator-sisyphus",
+  "atlas",
 ])
 
 export const BuiltinSkillNameSchema = z.enum([
@@ -50,7 +50,7 @@ export const OverridableAgentNameSchema = z.enum([
   "frontend-ui-ux-engineer",
   "document-writer",
   "multimodal-looker",
-  "orchestrator-sisyphus",
+  "atlas",
 ])
 
 export const AgentNameSchema = BuiltinAgentNameSchema
@@ -133,7 +133,7 @@ export const AgentOverridesSchema = z.object({
   "frontend-ui-ux-engineer": AgentOverrideConfigSchema.optional(),
   "document-writer": AgentOverrideConfigSchema.optional(),
   "multimodal-looker": AgentOverrideConfigSchema.optional(),
-  "orchestrator-sisyphus": AgentOverrideConfigSchema.optional(),
+  atlas: AgentOverrideConfigSchema.optional(),
 })
 
 export const ClaudeCodeConfigSchema = z.object({