sync: mirror deployed github repo (chains + sanitized bridge), keep GitLab CI

Make this monorepo's tracked tree identical to the deployed github repo
(github.com/pezkuwichain/pezkuwi-DKS): all RC/AH/People runtimes and framework
carry the mainnet fixes (incl. U128CurrencyToVote everywhere, so the staking
election stall cannot recur), and tools/usdt-bridge matches the current,
public-safe custody tooling (real config/deploy units gitignored, secret-file
locations and server IPs stripped, sanitized *.example templates committed).

Only exception to the mirror: GitLab-native CI is preserved (.gitlab-ci.yml and
.gitlab/), to be rebuilt to match the github CI pipeline in a follow-up.

.github/ISSUE_TEMPLATE/config.yml

@@ -1,7 +1,8 @@
-blank_issues_enabled: true
+blank_issues_enabled: false
 contact_links:
-  - name: Support & Troubleshooting with the Bizinikiwi Stack Exchange Community
-    url: https://exchange.pezkuwichain.io
-    about: |
-      For general problems with Bizinikiwi or related technologies, please search here first
-      for solutions, by keyword and tags. If you discover no solution, please then ask and questions in our community! We highly encourage everyone also share their understanding by answering questions for others.
+  - name: Security vulnerability
+    url: https://github.com/pezkuwichain/pezkuwi-DKS/security/policy
+    about: Do NOT open a public issue. Report security/fund-risk issues privately (see SECURITY.md).
+  - name: Documentation & developer portal
+    url: https://docs.pezkuwichain.io
+    about: Guides and API documentation.