docs: update GovOPlaN repository links

docs/MAIL_HANDBOOK.md

@@ -17,7 +17,7 @@ campaign definition, contact database, or general records store.
 | Release reviewer | [Acceptance checklist](#acceptance-checklist) |
 
 See also [Mail protocol roadmap](MAIL_PROTOCOL_ROADMAP.md) and the Campaign
-[Mail profile boundary](https://git.add-ideas.de/add-ideas/govoplan-campaign/src/branch/main/docs/MAIL_PROFILE_BOUNDARY.md).
+[Mail profile boundary](https://git.add-ideas.de/GovOPlaN/govoplan-campaign/src/branch/main/docs/MAIL_PROFILE_BOUNDARY.md).
 
 ## Domain ownership
 
@@ -358,7 +358,7 @@ equivalent canonical audit events. Consumer send/retry/reconciliation evidence
 belongs primarily to the consuming module today. A Mail-owned restricted
 provider-attempt ledger with correlation, retention, and unknown-outcome
 reconciliation remains part of the durable outbox work in
-[`govoplan-mail#17`](https://git.add-ideas.de/add-ideas/govoplan-mail/issues/17).
+[`govoplan-mail#17`](https://git.add-ideas.de/GovOPlaN/govoplan-mail/issues/17).
 
 ## Acceptance checklist
 
@@ -389,7 +389,7 @@ Before claiming a Mail composition is production-ready:
 
 - Durable, idempotent Campaign report delivery with Mail-owned attempts,
   unknown-outcome reconciliation, and partial-refusal evidence
-  ([`govoplan-mail#17`](https://git.add-ideas.de/add-ideas/govoplan-mail/issues/17)).
+  ([`govoplan-mail#17`](https://git.add-ideas.de/GovOPlaN/govoplan-mail/issues/17)).
 - Canonical audit events for profile tests and the remaining profile/policy
   administration lifecycle, plus an operator-visible Redis-throttling
   degradation signal.