fix(redis): cluster 模式 keys() 跨所有主分片 fan-out + 修 Dockerfile 漏拷 benchmark/(#44)

实测 heicode-rd（OSSCluster，2 分片）：默认 keys() 只命中单节点，
漏掉其它分片上的 key → agent_registry/task_queue 枚举不全。
cluster 模式下改用 target_nodes=PRIMARIES，redis-py 合并各节点结果。

附带修 agent_swarm#44 Bug1：Dockerfile.orchestrator 漏 COPY benchmark/
（orchestrator/quality.py 启动即 import benchmark.fixtures/metrics）→
原镜像 CrashLoopBackOff。新增 .dockerignore 控制构建上下文。

影响范围：仅 agent_swarm orchestrator（连接层 + 构建物料）；
不改契约/计费/审计/密钥落地。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,9 @@
+.git
+**/__pycache__
+**/*.pyc
+*.md
+desktop-client
+test-data
+artifacts
+kind-config.yaml
+.github

Dockerfile.orchestrator

@@ -9,6 +9,10 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy orchestrator code
 COPY orchestrator/ ./orchestrator/
 
+# orchestrator/quality.py imports benchmark.fixtures / benchmark.metrics at startup,
+# so the package must be present in the image (agent_swarm#44). stdlib-only — no extra pip.
+COPY benchmark/ ./benchmark/
+
 # Expose port
 EXPOSE 8000
 

orchestrator/redis_client.py

@@ -172,7 +172,16 @@ class RedisClient:
         await self.client.hdel(name, *keys)
 
     async def keys(self, pattern: str) -> list:
-        """Get keys matching pattern."""
+        """Get keys matching pattern.
+
+        In cluster mode KEYS must fan out to every primary and merge — the default
+        routing hits a single node, so on a multi-shard cluster it silently drops
+        keys living on other shards (breaks agent/task enumeration). redis-py merges
+        the per-node results into one flat list.
+        """
+        if self.cluster:
+            from redis.asyncio.cluster import RedisCluster
+            return await self.client.keys(pattern, target_nodes=RedisCluster.PRIMARIES)
         return await self.client.keys(pattern)
 
     async def lpush(self, key: str, *values: str):