fix(api): generate typescript EventEnvelope with typed seq

The typescript-axios generator was collapsing EventEnvelope's
allOf([inline_object, $ref: RunEvent]) to a bare `type
EventEnvelope = RunEvent` alias, losing the `seq` field at the
type level. TypeScript consumers could write `envelope.seq` and
get `any` (via RunEvent's additionalProperties index signature),
but had no type-level guarantee that seq was present.

Extract `EventSeq` as a named component schema and switch
EventEnvelope's allOf to two $refs. typescript-axios now
generates `export type EventEnvelope = EventSeq & RunEvent`,
which makes `envelope.seq: number` a typed property.

The Rust progenitor client is unchanged: it still flattens the
allOf into a single EventEnvelope struct with `seq: i64` inline,
exactly as before. Wire JSON is byte-identical on both sides.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/api-reference/fabro-api.yaml

@@ -2712,20 +2712,24 @@ components:
           additionalProperties: true
       additionalProperties: true
 
+    EventSeq:
+      description: Assigned sequence number component of a stored event envelope.
+      type: object
+      required:
+        - seq
+      properties:
+        seq:
+          type: integer
+          description: Assigned event sequence number.
+          example: 42
+
     EventEnvelope:
       description: >
         Stored event envelope with assigned sequence number. On the wire the
         envelope is flattened: seq sits alongside the RunEvent payload fields
         at the top level of the JSON object.
       allOf:
-        - type: object
-          required:
-            - seq
-          properties:
-            seq:
-              type: integer
-              description: Assigned event sequence number.
-              example: 42
+        - $ref: "#/components/schemas/EventSeq"
         - $ref: "#/components/schemas/RunEvent"
 
     PaginatedEventList:

lib/packages/fabro-api-client/src/.openapi-generator/FILES

@@ -62,6 +62,7 @@ models/disk-usage-summary-row.ts
 models/error-response-entry.ts
 models/error-response.ts
 models/event-envelope.ts
+models/event-seq.ts
 models/execute-query-request.ts
 models/execute-query-response-rows-inner-inner.ts
 models/execute-query-response.ts

lib/packages/fabro-api-client/src/models/event-envelope.ts

@@ -18,12 +18,15 @@
 import type { ActorRef } from './actor-ref';
 // May contain unused imports in some cases
 // @ts-ignore
+import type { EventSeq } from './event-seq';
+// May contain unused imports in some cases
+// @ts-ignore
 import type { RunEvent } from './run-event';
 
 /**
  * @type EventEnvelope
  * Stored event envelope with assigned sequence number. On the wire the envelope is flattened: seq sits alongside the RunEvent payload fields at the top level of the JSON object. 
  */
-export type EventEnvelope = RunEvent;
+export type EventEnvelope = EventSeq & RunEvent;
 
 

lib/packages/fabro-api-client/src/models/event-seq.ts

@@ -0,0 +1,26 @@
+/* tslint:disable */
+/* eslint-disable */
+/**
+ * Fabro Run API
+ * HTTP API for managing Fabro workflow run executions.
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+
+/**
+ * Assigned sequence number component of a stored event envelope.
+ */
+export interface EventSeq {
+    /**
+     * Assigned event sequence number.
+     */
+    'seq': number;
+}
+

lib/packages/fabro-api-client/src/models/index.ts

@@ -44,6 +44,7 @@ export * from './disk-usage-summary-row';
 export * from './error-response';
 export * from './error-response-entry';
 export * from './event-envelope';
+export * from './event-seq';
 export * from './execute-query-request';
 export * from './execute-query-response';
 export * from './execute-query-response-rows-inner-inner';