Fix runId validation in turso/redis facade to allow client-provided runId (#28)

Upstream now sends client-provided runId for run_created events.
Both storage.ts AND index.ts facade layers must allow non-null runId
for run_created events.

Use conditional branching with type assertions to satisfy TypeScript
overload resolution for events.create():
- null runId → RunCreatedEventRequest overload
- string runId → CreateEventRequest overload

https://claude.ai/code/session_016KjC15tQfm7ccAuTBNVyWD

Co-authored-by: Claude <noreply@anthropic.com>

Author: dustintownsend

packages/redis/src/index.ts

@@ -228,14 +228,10 @@ export function createWorld(config: RedisWorldConfig = {}): World {
       if (data.eventType !== 'run_created') {
         throw new Error('runId must be a string for non run_created events');
       }
-      return storage.events.create(null, data, params);
+      return storage.events.create(null, data as RunCreatedEventRequest, params);
     }
 
-    if (data.eventType === 'run_created') {
-      throw new Error('runId must be null for run_created events');
-    }
-
-    return storage.events.create(runId, data, params);
+    return storage.events.create(runId, data as CreateEventRequest, params);
   }
 
   async function listEvents(

packages/turso/src/index.ts

@@ -263,14 +263,10 @@ export function createWorld(config: TursoWorldConfig = {}): World {
       if (data.eventType !== 'run_created') {
         throw new Error('runId must be a string for non run_created events');
       }
-      return storage.events.create(null, data, params);
+      return storage.events.create(null, data as RunCreatedEventRequest, params);
     }
 
-    if (data.eventType === 'run_created') {
-      throw new Error('runId must be null for run_created events');
-    }
-
-    return storage.events.create(runId, data, params);
+    return storage.events.create(runId, data as CreateEventRequest, params);
   }
 
   async function listEvents(