fix: disable strict mode for enhancement JSON schema (#99)

strict: true requires all property names to be known upfront,
which is incompatible with the dynamic-key maps in slotFills.
Also replace type array with anyOf for nullable slot values.

apps/aelis-backend/src/enhancement/llm-client.ts

@@ -46,7 +46,7 @@ export function createLlmClient(config: LlmClientConfig): LlmClient {
 						type: "json_schema" as const,
 						jsonSchema: {
 							name: "enhancement_result",
-							strict: true,
+							strict: false,
 							schema: enhancementResultJsonSchema,
 						},
 					},