ServiceInvocationsCount() fails when no invocations has been made yet #99
Description
Describe the bug
When calling microcksContainer.ServiceInvocationsCount(ctx, "API Pastries", "0.0.1") when no prior invocations has been made, this raise an exception:
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x0 pc=0x1043ac474]
goroutine 35 [running]:
testing.tRunner.func1.2({0x1044d0920, 0x1047dccb0})
/Users/laurent/Development/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.1.darwin-arm64/src/testing/testing.go:1631 +0x1c4
testing.tRunner.func1()
/Users/laurent/Development/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.1.darwin-arm64/src/testing/testing.go:1634 +0x33c
panic({0x1044d0920?, 0x1047dccb0?})
/Users/laurent/Development/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.1.darwin-arm64/src/runtime/panic.go:770 +0x124
microcks.io/testcontainers-go.(*MicrocksContainer).ServiceInvocationsCountAtDate(0x14000597ea8?, {0x10456fff0, 0x10488ad20}, {0x1043b24de, 0xc}, {0x1043afb81, 0x5}, {0x14000114a50?, 0x1044adcc0?, 0x104823740?})
/Users/laurent/Development/go/pkg/mod/microcks.io/testcontainers-go@v0.3.0/microcks.go:391 +0x1d4
microcks.io/testcontainers-go.(*MicrocksContainer).ServiceInvocationsCount(0x140004c8750, {0x10456fff0, 0x10488ad20}, {0x1043b24de, 0xc}, {0x1043afb81, 0x5})
/Users/laurent/Development/go/pkg/mod/microcks.io/testcontainers-go@v0.3.0/microcks.go:366 +0x64
github.com/microcks/microcks-testcontainers-go-demo/internal/client_test.TestListPastries(0x1400012cb60)
/Users/laurent/Development/github/microcks-testcontainers-go-demo/internal/client/pastry_api_test.go:82 +0xd4
Expected behavior
It should return 0
Actual behavior
See description.
How to Reproduce?
No response
Microcks version or git rev
No response
Install method (docker-compose, helm chart, operator, docker-desktop extension,...)
No response
Additional information
No response