Adding pytest dependency

apps/cli/executables/pexable/carta_envoy/pyproject.toml

apps/cli/executables/pexable/casa_envoy/pyproject.toml

apps/cli/executables/pexable/conveyor/pyproject.toml

apps/cli/executables/pexable/deliver/pyproject.toml

apps/cli/executables/pexable/ingest/pyproject.toml

apps/cli/executables/pexable/ingest_envoy/pyproject.toml

apps/cli/executables/pexable/mediator/pyproject.toml

apps/cli/executables/pexable/null/pyproject.toml

apps/cli/executables/pexable/productfetcher/pyproject.toml

apps/cli/executables/pexable/update_stage/pyproject.toml

apps/cli/executables/pexable/vela/pyproject.toml

apps/cli/executables/pexable/wf_inspector/pyproject.toml

apps/cli/executables/pexable/ws_annihilator/pyproject.toml

apps/cli/executables/pexable/ws_metrics/pyproject.toml

apps/cli/utilities/aat_wrest/poetry.lock

apps/cli/utilities/aat_wrest/pyproject.toml

apps/cli/utilities/contacts_wrest/pyproject.toml

apps/cli/utilities/core_sampler/pyproject.toml

apps/cli/utilities/wf_monitor/pyproject.toml

services/capability/pyproject.toml