feat: allow to manage display_order value for building block definiti…

[j0g3sc]

…on I/O without affecting the calculated hash for change detection

CU-86cabn76y

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Summary

Added a manageable display_order field to building block definition version inputs and outputs.

Implementation:

Client
DisplayOrder int64 with json:"displayOrder,omitempty" on both MeshBuildingBlockDefinitionInput and MeshBuildingBlockDefinitionOutput.

Schema
display_order Int64Attribute on inputs and outputs, Optional + Computed + Default(0) — the Default is what keeps re-plans clean given the backend returns 0 when unset.

Content hash
stripped to 0 before hashing, so reordering never changes content_hash or forces a new version

Released immutability
displayOrdersDiffer guard in Update — needed because display_order is outside the hash, so this restores the "released versions are immutable" behavior with a clear error.

Mock
mirrors input→output display_order for manual BBDs.

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⚠️ depends on meshfed-api released with https://github.com/meshcloud/meshfed-release/pull/10263

[github-actions]

📊 Test Coverage

Scope	Coverage
Unit tests (mock client)	74.9%
Combined (unit + acceptance)	80.5% — ❌ acceptance failed

❌ Acceptance tests failed (advisory — the job runs against the last merged meshfed-release backend, so a change needing a companion backend PR fails here until that backend merges; the real gate is meshfed-release's terraform-provider-acceptance job).

Uncovered functions (combined run)

github.com/meshcloud/terraform-provider-meshstack/client/api_key_permissions.go:225:							AllApiKeyPermissions				0.0%
github.com/meshcloud/terraform-provider-meshstack/client/buildingblock.go:97:								Delete						0.0%
github.com/meshcloud/terraform-provider-meshstack/client/client.go:48:									NewApiTokenAuthorization			0.0%
github.com/meshcloud/terraform-provider-meshstack/client/internal/logging.go:27:							Debug						0.0%
github.com/meshcloud/terraform-provider-meshstack/client/internal/logging.go:31:							Info						0.0%
github.com/meshcloud/terraform-provider-meshstack/client/internal/logging.go:35:							Warn						0.0%
github.com/meshcloud/terraform-provider-meshstack/client/internal/retry.go:225:								Close						0.0%
github.com/meshcloud/terraform-provider-meshstack/client/internal/retry.go:246:								Write						0.0%
github.com/meshcloud/terraform-provider-meshstack/client/project_group_binding.go:27:							Read						0.0%
github.com/meshcloud/terraform-provider-meshstack/client/project_group_binding.go:31:							Create						0.0%

Combined with go tool covdata merge over the unit and acceptance coverage data. The acceptance suite runs ./internal/provider against the live backend; coverage is attributed across all packages (-coverpkg=./...).

[github-actions]

⚠️ Acceptance tests failed on the latest run. This is advisory and does not block merge — the job runs against the last merged meshfed-release backend images. If this change needs a companion backend change, validate the pair via meshfed-release's terraform-provider-acceptance job; otherwise this is a regression to fix.

🔗 View the failing acceptance job