Archive probe repo after CORE-WP-0007-T01

Mark the IHP pipeline-validation probe archived, preserve diagnostic docs,
move IRP-WP-0001 to workplans/archived/, and disable push-triggered CI.

README.md

@@ -1,3 +1,24 @@
-# repo-seed
+# ihp-railiance-probe (archived)
 
-A git repository template to bootstrap coulomb projects from.
+**Status:** archived 2026-07-07 (`CORE-WP-0007-T01`)
+
+Minimal IHP-on-Railiance pipeline-validation probe — not a product. The probe
+completed its mission in May 2026 (`IRP-WP-0001`); production interaction
+framework responsibility moved to Core Hub (`CORE-WP-0005` cutover 2026-07-03).
+
+## Preserved knowledge
+
+Read these before touching any remaining Haskell/IHP build path:
+
+- `INTENT.md` — why the probe existed and what it proved
+- `DeploymentBlueprint.md` — deployment shape and operator notes
+- `PIPELINE_LOG.md` — successful build/deploy/smoke runs (2026-05-03, 2026-05-07)
+- `workplans/archived/260707-IRP-WP-0001-pipeline-validation.md` — full task evidence
+
+## Replacement
+
+- Production API: [Core Hub](https://gitea.coulomb.social/coulomb/core-hub)
+- Historical Haskell implementation: `inter-hub` (pending rename to
+  `inter-hub-haskell` in `CORE-WP-0007-T02`)
+
+CI workflows are disabled; do not schedule new haskelseed builds against this repo.