ENH: Tracking — drain the remaining open issues/PRs from archived InsightSoftwareConsortium repositories

Follow-on to the archival phase of the closed master tracker #6160. Every archived **ingested remote-module** repo is now drained (0 open issues, 0 open PRs). Four archived repos outside that set still carry open items and need the same disposition pass.

Remaining work — the complete residual list (verified 2026-07-29)

Enumerated all 47 archived repos under `InsightSoftwareConsortium` and their open counts. Only these four are non-zero:

| Repo | Open item | Notes |
|---|---|---|
| `ITKTBBImageToImageFilter` | PR #11 — `WIP: COMP: General update to compile with legacy turned off` (@dzenanz) | WIP by a current ITK maintainer; ask before closing |
| `ITKNeuralNetworks` | PR #15 — `ENH: Transition project configuration to pyproject.toml` (@jhlegarreta) | Repo is archived/dead; the PR is likely moot |
| `ITKApps` | Issue #1 — `Error on ./DeformableModelSimplexMesh`; PR #2 — `Make DeformableModel Compiled` (@myousefi2016) | Not an ingested module; disposition is close-with-pointer |
| `ITKBuildRobot` | Issue #3 — `Close this repository` | Self-resolving: the repo is already archived; close the issue |

Goal: zero open issues **and** zero open PRs in every archived repo.

Already complete — the ingested remote-module drain

All archived ingested remote-module repos report 0 open issues and 0 open PRs, including: AnisotropicDiffusionLBR, Montage, GenericLabelInterpolator, FastBilateral, MeshNoise, ParabolicMorphology, Thickness3D, Cuberille, IOMeshSTL, PolarTransform, SplitComponents, IOMeshMZ3, IOFDF, LabelErodeDilate, HigherOrderAccurateGradient, PrincipalComponentsAnalysis, TextureFeatures, SubdivisionQuadEdgeMeshFilter, SmoothingRecursiveYvvGaussian.

Migrated items now live on the ITK tracker as `#6284`–`#6300` under the `: ` naming convention (e.g. #6296 "Montage: Clean up debug code", #6300 "TextureFeatures: Lower the default number of bins", #6298 "SplitComponents: does not work properly with VectorImage or RGB in Python"). Several are already closed (#6285, #6297, #6306).

Note: `ITKMGHIO`, `ITKStrain`, `ITKRLEImage`, `ITKAdaptiveDenoising`, `ITKMorphologicalContourInterpolation` and `ITKMultipleImageIterator` no longer exist under the org — they were deleted rather than archived, so there is nothing to drain.
</details>

<details>
<summary>Process — the template and the sanctioned unarchive loop</summary>

Each open item gets a **human judgement call**, not a mechanical close: is it obsolete-by-ingest, superseded, or still-valid feature/test debt? Then either (a) close with a comment pointing at ITK, or (b) mirror into an ITK tracking issue crediting the original author and linking the archived original, then close.

Worked template — `ITKAnisotropicDiffusionLBR#26` ("Improve tests"):
1. ITK issue **#6283** created, mirroring the body, crediting the author, linking the original.
2. Addressed by ITK PR **#6282** (`Closes #6283`).
3. unarchive → comment + close #26 as `NOT_PLANNED` pointing at #6283/#6282 → **re-archive**.

Archived repos are read-only, so acting on them requires the sanctioned unarchive→act→re-archive toggle:

```bash
R=InsightSoftwareConsortium/<Repo>
gh api -X PATCH repos/$R -F archived=false --jq .archived # expect: false
# ... gh issue comment / gh issue close / gh pr close ...
gh api -X PATCH repos/$R -F archived=true --jq .archived # expect: true (MUST restore)
```

Batch all of one repo's items inside a single unarchive window, and **always verify re-archive succeeded** before moving on. Open PRs may warrant a takeover (a fresh ITK PR crediting the original author via `Co-Authored-By`) rather than plain closure — judge per item.
</details>

<!--
provenance: .devlocal/hints/archived-remote-module-issue-pr-cleanup.md (claude-code audit 2026-07-29)
todo_line: L128
target_repo: InsightSoftwareConsortium/ITK
verified_refs: 47 archived repos enumerated via gh repo list --json isArchived; only ITKTBBImageToImageFilter (PR #11), ITKNeuralNetworks (PR #15), ITKApps (issue #1 + PR #2), ITKBuildRobot (issue #3) have open items; all archived ingested remote modules are at 0/0; ITK #6284-#6300 exist as the migrated set; ITK #6160 CLOSED; ITK #6283 CLOSED, PR #6282 the template
stale_refs: TODO text says "12 repos drained ... continue with remaining repos in the catalog" — the ingested-module catalog is in fact fully drained; hint's candidate list names 6 repos (ITKMGHIO, ITKStrain, ITKRLEImage, ITKAdaptiveDenoising, ITKMorphologicalContourInterpolation, ITKMultipleImageIterator) that no longer exist under the org
suggested_commit_prefix: ENH:
-->

Start with .devlocal/hints/archived-remote-module-issue-pr-cleanup.md at L128 and review tracker #6160, then inspect the four listed archived repositories and their open items. Use the documented gh API unarchive→act→re-archive loop, applying the stated mirror-or-close judgement to each item. Done means all four repositories have zero open issues and PRs and are verified archived again.

Written by the indexing model from the issue text.