docs(aigw): repoint or unlink api-reference links that leak to the Latest version

[vrv-panw]

Links under aigw/ that pointed at /api-reference/... were resolving against the Latest Portkey-branded version. Nothing flagged them as broken, because the targets are real — they are just in the wrong version. A Prisma AIRS reader clicking an API link silently left the Prisma AIRS docs.

Count goes 122 → 90.

Three classes, handled page by page rather than by bulk prefix:

Class	Action	Examples
Target exists under aigw/	Repointed	inference-api/headers, inference-api/config-object, inference-api/open-api-specification, integrations/libraries/microsoft-semantic-kernel
Target will never exist	Card removed / prose unlinked, text kept	/api-reference/sdk (no SDK reference in aigw/); Workspaces, Users, Log Exports Admin API groups (dropped from the spec)
Target never carried into aigw/	Unlinked, text kept	gateway-for-other-apis, anthropic-transform, a Messages API reference

Incidental fix: aigw/api-reference/inference-api/open-api-specification.mdx frontmatter still redirected readers to https://github.com/Portkey-AI/openapi rather than the PaloAltoNetworks repo.

Not in this PR

The remaining ~90 links all target generated operation pages. Every operation summary in the spec is empty and no operation carries x-mint, so the generated pages have neither titles nor pinned URLs — there is nothing stable to point at yet. Blocked on x-mint.href being set upstream in the spec repo.

Five pre-existing broken links under aigw/ are also left alone (out of slice): inference-api/embeddings ×2, inference-api/batch/create-batch (both in the blocked class above), and aigw/support/contact-us ×2 (no such page was carried into aigw/).

Verification

• mint validate — green
• mint broken-links — no new breakage under aigw/

🤖 Generated with Claude Code

[vrv-panw]

Superseded by #1079, which lands phases 3, 4 and 5 against main in one PR. Every commit here is included there.