chore(rename): railiance-hosts → railiance-infra

Update all operational references to reflect the new repo name per
ADR-003 (OAS S1 Infrastructure Substrate). Historical text in ADRs
and state-hub-inbox files preserved as-is. Gitea remote URL updated
locally (Gitea repo rename is a manual step).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

workplans/RAIL-HO-WP-0001-hosteurope-bootstrap.md

@@ -3,7 +3,7 @@ id: RAIL-HO-WP-0001
 type: workplan
 title: "Secure Single-Server Bootstrap at HostEurope"
 domain: railiance
-repo: railiance-hosts
+repo: railiance-infra
 status: completed
 owner: railiance
 topic_slug: railiance

workplans/RAIL-HO-WP-0002-server-spec-and-test-suite.md

@@ -3,7 +3,7 @@ id: RAIL-HO-WP-0002
 type: workplan
 title: "Server Specification and Automated Test Suite"
 domain: railiance
-repo: railiance-hosts
+repo: railiance-infra
 status: completed
 owner: railiance
 topic_slug: railiance

workplans/RAIL-HO-WP-0003-5repo-stack-restructure.md

@@ -3,7 +3,7 @@ id: RAIL-HO-WP-0003
 type: workplan
 title: "Railiance 5-Repo Stack Restructure"
 domain: railiance
-repo: railiance-hosts
+repo: railiance-infra
 status: active
 owner: railiance
 topic_slug: railiance