refactor(hub): dispatch 家族收敛为 dispatchsvc 包并去 Setter 装配

[DeliciousBuding]

Summary

hub Top 1：agent_dispatch 8 文件散装（~1500 行）从平铺 service 包收敛到 internal/service/dispatchsvc。

1. 包边界：DispatchService 家族整体平移（git mv 保留历史），DispatchTask / RedispatchDelivery 显式导出作为跨包缝；AgentService 对外 API 不变（handler/app 层零改动）。
2. 传输层去耦（hub Top 3 联动）：ManagerPort/ConnPort/FramePort/DeliveryResultPort 取代直接引用 *ws.Conn/ws.Frame/ws.DeliveryResult 的 dispatchWS 端口——dispatchsvc 不再 import internal/ws；service 层新增 wsManagerAdapter 映射。RelayPort（仅返回 error）取代 relayDispatcher，relayServiceAdapter 丢弃 dispatch 不消费的命令元数据。
3. 装配收敛：删除 DispatchService 的 5 个 Setter（SetBus/SetCache/SetManager/SetOutbox/SetRelay，零生产调用点），构造函数一次性注入。
4. 归属收拢：resolveDispatchCache/isNilCache/redispatchTarget 随家族迁入 dispatchsvc；dispatchRedispatcher 适配器走导出 RedispatchDelivery 缝。
5. 测试随迁：breaker/edge_http 测试与端口 mock 迁入 dispatchsvc 包（白盒访问保留），service 侧集成测试改用导出缝。

lint 欠账顺带清偿：auth_test.go 夹具变量重命名消除 G101（#1670 清偿后从 max-same-issues 封顶浮出的下一处）；hub-lint-baseline 对移动的 gocognit 条目做外科式路径更新（2 行 diff，刻意不整表重建——本地 Windows lint 输出与 CI 基线环境有差异，见 Wave-10 注释）。

Test plan

• go build / go vet / staticcheck 全绿
• go test ./... -count=1 -short -race -coverprofile 通过（CI 同款）；dispatchsvc 包全过
• 门禁：hub-layering / hub-pure-packages / outbound-hygiene / dto / openapi / lint-ratchet 全部 PASS；git diff --check 干净

后续队列（依赖本 PR 的收尾）

• AgentService 懒门面（dispatchService()/deliveryOutboxService()/runEventService()）删除——需要把 ~60 处测试结构体字面量改为构造装配，单独立项
• app/events.go pending 重放下沉（hub Top 2）
• DispatchTask 复杂度 98 拆分（gocognit 记账在案，随下一步路由拆解一并偿还）

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📥 Commits

Reviewing files that changed from the base of the PR and between ca41223 and cb4244a.

📒 Files selected for processing (25)

• hub-server/internal/middleware/auth_test.go
• hub-server/internal/service/agent.go
• hub-server/internal/service/agent_dispatch_facade.go
• hub-server/internal/service/agent_logic_test.go
• hub-server/internal/service/agent_test.go
• hub-server/internal/service/cache_fallback.go
• hub-server/internal/service/cache_fallback_test.go
• hub-server/internal/service/delivery_outbox_model.go
• hub-server/internal/service/delivery_outbox_retry.go
• hub-server/internal/service/delivery_outbox_test.go
• hub-server/internal/service/dispatch_adapters.go
• hub-server/internal/service/dispatchsvc/agent_dispatch.go
• hub-server/internal/service/dispatchsvc/agent_dispatch_breaker.go
• hub-server/internal/service/dispatchsvc/agent_dispatch_breaker_test.go
• hub-server/internal/service/dispatchsvc/agent_dispatch_context.go
• hub-server/internal/service/dispatchsvc/agent_dispatch_edge_http.go
• hub-server/internal/service/dispatchsvc/agent_dispatch_edge_http_test.go
• hub-server/internal/service/dispatchsvc/agent_dispatch_lifecycle.go
• hub-server/internal/service/dispatchsvc/agent_dispatch_ports.go
• hub-server/internal/service/dispatchsvc/agent_dispatch_target_bound.go
• hub-server/internal/service/dispatchsvc/cache_port.go
• hub-server/internal/service/dispatchsvc/cache_port_test.go
• hub-server/internal/service/dispatchsvc/doc.go
• hub-server/internal/service/dispatchsvc/ports_test.go
• scripts/verify/hub-lint-baseline.json

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