feat: add Connect-Go stubs for telemetry and gateway services

Adds protoc-gen-connect-go to the protoc pipeline and generates
*connect packages for TelemetryAnalytics (v1) and GatewayAnalytics (v2),
enabling consumers to expose these services over Connect protocol,
gRPC-Web, and native gRPC from a single HTTP handler.

Existing .pb.go and _grpc.pb.go files are untouched.

feat: add telemetry analytics service proto

Add TelemetryAnalytics gRPC service with 4 endpoints:
- SearchEvents: query telemetry events with filters and pagination
- GetTimeHistogram: time-bucketed event counts
- GetAggregations: stats grouped by device/sensor dimensions
- GetLatestEvents: LLM-friendly recent events with natural language summary

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Merge pull request #1 from myDevicesIoT/feat/deloean-pg-build

Fix: readme

Fix: package name