chore(deps): bump google.golang.org/grpc from 1.79.2 to 1.79.3

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.79.2 to 1.79.3.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.79.2...v1.79.3)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-version: 1.79.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

go.mod

@@ -54,7 +54,7 @@ require (
 	// https://pkg.go.dev/google.golang.org/genproto/googleapis/rpc?tab=versions
 	google.golang.org/genproto/googleapis/api v0.0.0-20251202230838-ff82c1b0f217
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217
-	google.golang.org/grpc v1.79.2
+	google.golang.org/grpc v1.79.3
 	// These runtime protoc-gen-go-grpc & protobuf versions should be identical to the package versions
 	// used for the generated code (see PROTOC_GEN_GO_GRPC & PROTOBUF_GO in backend/api/Dockerfile)
 	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1