Add unit tests for conductor ironic sync orchestrators

[berendt]

Implements #2227.

Adds tests/unit/tasks/conductor/test_ironic_sync.py covering the four
sync orchestrators in osism/tasks/conductor/ironic.py. Tests focus on
state transitions and branch coverage, asserting on push_task_output
substrings rather than exact strings, as the issue requests.

What the single commit adds

A new test module organised into four clearly-labelled sections, one per
target function. It patches the module-level imports
(osism_utils, openstack, netbox, deep_compare, mask_secrets,
_matches_netbox_filter, _prepare_node_attributes,
_sync_ironic_device, _sync_ironic_device_dry_run) following the
existing mocker + SimpleNamespace conventions used in the sibling
test_netbox.py / test_config.py.

_sync_ironic_device (ironic.py:354)

• Create path: node created with automated_clean=False;
  target_raid_config applied via baremetal_node_set_target_raid_config;
  a (False, "error") result raises an exception mentioning
  target_raid_config.
• Update path: deep_compare populates node_updates → update with
  full node_attributes; the driver password key (resolved via
  driver_params[driver]["password"]) is popped, and a password-only
  delta drops driver_info so no update happens unless force=True.
• Port reconciliation: extra ports deleted, new MACs created,
  comparison is case-insensitive.
• State machine: management-validation failure returns early;
  enroll / clean failed move to manageable; power is forced off;
  boot-validation failure on available demotes to manageable;
  adoption from manageable and from available; the normal
  manage→provide→available path including the automated_clean
  toggles; set_boot_device failure is caught; is_adoption derives
  from the provision_state == "active" custom field.

_sync_ironic_device_dry_run (ironic.py:570)

• Secret values collected from password/secret/ironic_osism_*
  string keys and passed to mask_secrets (call args verified;
  non-strings and unrelated keys ignored).
• Create branch (adopt vs. available, with active implying adopt) and
  update branch (update vs. no-update-needed, port create/delete,
  current provision_state reported).

sync_ironic (ironic.py:681)

• NetBox/Ironic unreachable → finish_task_output(rc=1); node_name
  not found; dry-run path; lock acquired (device synced and released in
  finally, even on exception) and lock contention; stale-node cleanup
  (delete, dry-run "Would delete", clean failed → manageable first,
  ineligible "Cannot remove"); skip/extra_kernel_params propagation;
  ports_attributes filtering by enabled and not mgmt_only and mac_address.

sync_netbox_from_ironic (ironic.py:877)

• Filtered selection (primary match, secondary fallback, no match, all
  unreachable) and unfiltered selection (primary unreachable, all/one
  secondary reachable, no secondaries message); node-name not found;
  set_* called with secondary_nb_list=reachable_secondaries;
  failed-device reporting; Ironic unreachable.

Verification

• black --check and flake8 pass on the new file.
• pytest was not run in this local environment per my standing
  workflow preference of letting CI run the suite; the Zuul
  python-osism-unit-tests job is the verification gate for this draft.

Notes

• The change is purely additive (one new test file); no production code
  is touched.
• Per the issue, coverage of some defensive except branches and
  message-only push paths is intentionally left lower.

Assisted-by: Claude:claude-opus-4-8

[sourcery-ai]

Hey - I've left some high level feedback:

• The new test module is quite large (~950 lines); consider splitting it into smaller files or grouping related tests into classes (e.g. per orchestrator) to keep each unit more focused and easier to navigate.
• There is some repeated setup logic for openstack.baremetal_node_show and baremetal_node_validate in multiple tests; extracting additional fixtures or helper functions for common scenarios (e.g. 'manageable node with valid validation', 'available node with boot failure') would reduce duplication and make the intent of each test clearer.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The new test module is quite large (~950 lines); consider splitting it into smaller files or grouping related tests into classes (e.g. per orchestrator) to keep each unit more focused and easier to navigate.
- There is some repeated setup logic for `openstack.baremetal_node_show` and `baremetal_node_validate` in multiple tests; extracting additional fixtures or helper functions for common scenarios (e.g. 'manageable node with valid validation', 'available node with boot failure') would reduce duplication and make the intent of each test clearer.

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