[quality] add cross-catalog invariant tests — lock current state, catch new regressions

[hivecommons-hive]

Test Improvement

Adds scripts/__tests__/cross-catalog-invariants.test.mjs — 12 tests covering cross-catalog invariants that the mission generators depend on but that scripts/__tests__/catalog-invariants.test.mjs does not check.

Why

Two generators merge these three catalogs:

• generate-cncf-missions.mjs:1441 — [...CNCF_PROJECTS, ...OTHER_PROJECTS.map(...)], keyed by .name, uses CATEGORY_TO_DIR[category] for the fixes/ subdirectory
• generate-platform-missions.mjs:508 — [...K8S_PLATFORMS, ...OTHER_PROJECTS], keyed by .name

Silent violations of the merge assumptions corrupt generated output without failing CI today. The existing per-catalog suite plus one cross-cut (K8S ∩ OTHER by name) leaves the rest unguarded.

What this PR adds

Test group	Invariant
Name collisions (generate-cncf-missions merge)	CNCF ∩ OTHER by name, CNCF ∩ K8S by name (defensive)
Repo collisions	CNCF internal repo uniqueness, CNCF ∩ OTHER by repo, K8S ∩ OTHER by repo
OTHER_PROJECTS pipeline compat	.category ⊆ CATEGORY_TO_DIR keys, sources.stackoverflow.tags shape, sources.reddit.subreddits shape

While writing the suite, five distinct pre-existing data-debt violations surfaced on master (details filed as #3277). Rather than silently patch data or leave the suite red, each is captured in a named KNOWN_*_DEBT allowlist — the same pattern already used by catalog-invariants.test.mjs's KNOWN_TRAILING_HYPHEN_DEBT:

• KNOWN_CNCF_OTHER_NAME_COLLISIONS — 6 entries
• KNOWN_CNCF_K8S_NAME_COLLISIONS — 4 entries
• KNOWN_CNCF_INTERNAL_REPO_DUPES — 1 entry
• KNOWN_CNCF_OTHER_REPO_COLLISIONS — 5 entries
• KNOWN_UNMAPPED_OTHER_CATEGORIES — 27 distinct categories

Each allowlist is paired with a companion ... stays honest test that fails if an allowlist entry no longer describes a real violation — so entries cannot be left in the list after the underlying debt is paid down.

Verification

$ npm test  # 'vitest run' in scripts/
Test Files  78 passed (78)
Tests       1146 passed | 1 expected fail (1147)

The new suite alone: Test Files 1 passed | Tests 12 passed. The full existing 1146-test suite still passes end-to-end.

Scope

• No production data change. cncf-projects.mjs, k8s-platforms.mjs, other-projects.mjs are untouched.
• No production code change. No generator or helper modified.
• No workflow change. .github/workflows/scripts-tests.yml already runs npm test (= vitest run) which auto-discovers *.test.mjs files under scripts/__tests__/.
• Complements — does not replace — the per-file invariants in scripts/__tests__/catalog-invariants.test.mjs.

Refs #3277

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Filed by quality agent (ACMM L4/L6 — full mode)

— hive: agent=quality backend=copilot model=claude-opus-4.7

[hivecommons-hive]

Important

Held for human sign-off on the direction, not on the code.

This PR's only tracked rationale is #3277, which the hive filed itself — issue #3277 was filed by kubestellar-hive[bot] and no human has acknowledged it. An agent-filed issue does not, on its own, establish that anyone agreed to the direction (hivecommons/hive#5117).

The change may well be right; nothing here is a review of it. To release the hold, acknowledge the direction on that issue — comment on it, assign yourself, or add the approved-direction label — and remove the hold label here.

[kubestellar-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[clubanderson]

Direction acknowledged by hub admin (approved-direction added on #3277); releasing the #5117 hold. This hive runs at ACMM L6 and may act on its own findings.

[github-actions]

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