Pinned all Python deps, allowing 'python' to vary with patches

apps/cli/executables/pexable/carta_envoy/poetry.lock

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

apps/cli/executables/pexable/casa_envoy/poetry.lock

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

apps/cli/executables/pexable/conveyor/poetry.lock

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

apps/cli/executables/pexable/deliver/poetry.lock

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

apps/cli/executables/pexable/ingest_envoy/poetry.lock

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

apps/cli/executables/pexable/mediator/poetry.lock

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

apps/cli/executables/pexable/null/poetry.lock

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

apps/cli/executables/pexable/productfetcher/poetry.lock

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

apps/cli/executables/pexable/update_stage/poetry.lock

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

apps/cli/executables/pexable/vela/poetry.lock

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