feat: замена Kafka → shared-SQS в IoT pipeline

- mqtt-bridge: kafka.Writer → SQS SendMessage (AWS SDK Go v2)
- kafka-consumer → sqs-consumer: polling loop с ReceiveMessage/DeleteMessage
- admin stats: Kafka lag → SQS GetQueueAttributes
- Удалён kafka-consumer, добавлен sqs-consumer
- go.mod: убран segmentio/kafka-go, добавлен aws-sdk-go-v2
- Dockerfile, Makefile: kafka-consumer → sqs-consumer
- .gitignore: исправлен чтобы не игнорировать cmd/ директории
- deployments: новый iot-sqs-consumer.yaml, обновлён mqtt-bridge
- doc/decisions: задокументировано решение

Dockerfile

@@ -1,6 +1,7 @@
 # Создано: 2026-04-12
+# Изменено: 2026-04-12 (kafka-consumer → sqs-consumer)
 # Dockerfile для IoT managed service.
-# Multi-stage build: 3 бинарника (iot-operator, mqtt-bridge, kafka-consumer).
+# Multi-stage build: 3 бинарника (iot-operator, mqtt-bridge, sqs-consumer).
 # Образ: naeel/iot-operator (Docker Hub).
 
 FROM golang:1.25 AS builder
@@ -19,11 +20,11 @@ COPY internal/ internal/
 # iot-operator — controller-manager + REST API
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o iot-operator ./cmd/iot-operator/
 
-# mqtt-bridge — MQTT (EMQX) → Kafka
+# mqtt-bridge — MQTT (EMQX) → shared-SQS
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o mqtt-bridge ./cmd/mqtt-bridge/
 
-# kafka-consumer — Kafka → Postgres
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o kafka-consumer ./cmd/kafka-consumer/
+# sqs-consumer — shared-SQS → Postgres
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o sqs-consumer ./cmd/sqs-consumer/
 
 # --- Runtime ---
 FROM gcr.io/distroless/static:nonroot
@@ -33,7 +34,7 @@ WORKDIR /
 # Какой запускать — определяется command в k8s Deployment.
 COPY --from=builder /workspace/iot-operator .
 COPY --from=builder /workspace/mqtt-bridge .
-COPY --from=builder /workspace/kafka-consumer .
+COPY --from=builder /workspace/sqs-consumer .
 
 USER 65532:65532
 ENTRYPOINT ["/iot-operator"]