docs: add Gitea milestone tracking instructions to all phase docs

Each phase doc now includes:
- Milestone Tracking section linking to the corresponding Gitea milestone
- Checklist item in Completion Criteria to close the milestone
- Phase 7 also closes the Final: Porting Complete milestone (ID 8)

docs/plans/phases/phase-7-porting-verification.md

@@ -17,6 +17,10 @@ Every ported module passes its targeted tests. Every item in the database reache
 - **Go source code** is located in the `golang/` folder (specifically `golang/nats-server/`)
 - **.NET ported version** is located in the `dotnet/` folder
 
+## Milestone Tracking
+
+This phase corresponds to **Milestone 7** in [Gitea](https://gitea.dohertylan.com/dohertj2/natsnet/milestone/7). When starting this phase, verify the milestone is open. Assign relevant issues to this milestone as work progresses.
+
 ## Verification Workflow
 
 Work through modules one at a time. Do not move to the next module until the current one is fully verified.
@@ -231,6 +235,22 @@ The issue is at a module boundary. Check:
 - Key behavioral scenarios produce equivalent results on Go and .NET servers
 - `phase check 7` passes with no errors
 - Final report exported and reviewed
+- [ ] Close the Phase 7 milestone in Gitea:
+  ```bash
+  curl -s -X PATCH "https://gitea.dohertylan.com/api/v1/repos/dohertj2/natsnet/milestones/7" \
+    -H "Content-Type: application/json" \
+    -H "Authorization: token $GITEA_TOKEN" \
+    -d '{"state":"closed"}'
+  ```
+  Or close it via the Gitea web UI at https://gitea.dohertylan.com/dohertj2/natsnet/milestone/7
+- [ ] Close the **Final: Porting Complete** milestone in Gitea:
+  ```bash
+  curl -s -X PATCH "https://gitea.dohertylan.com/api/v1/repos/dohertj2/natsnet/milestones/8" \
+    -H "Content-Type: application/json" \
+    -H "Authorization: token $GITEA_TOKEN" \
+    -d '{"state":"closed"}'
+  ```
+  Or close it via the Gitea web UI at https://gitea.dohertylan.com/dohertj2/natsnet/milestone/8
 
 ## Related Documentation