Add logarchiver repository

Registers the logarchiver Gitea repo: a k8s Go service that archives
raw logs from NATS JetStream to S3 as zstd-compressed, GPG-encrypted,
indexed objects, plus a CLI to search and retrieve them. It replaces the
Vector archiver leg of the centralized logging stack (argocd-apps #296)
with zstd compression, OpenPGP encryption keyed from the Vault GPG
secrets engine, and a ClickHouse-backed searchable index.

- Add config/git.unkin.net/unkin/repository/logarchiver.yaml modeled on
  the existing Go-service repos (encapi, cephrgw-operator): public repo,
  main default branch, squash merges, branch protection requiring the
  woodpecker pre-commit/test/build PR checks with benvin approval.

Claude-Session: https://claude.ai/code/session_015ur3i7D2azsMAWTSVABApv

config/git.unkin.net/unkin/repository/logarchiver.yaml

@@ -0,0 +1,14 @@
+description: "Archives raw logs from NATS JetStream to S3 as zstd-compressed, GPG-encrypted, indexed objects; plus a CLI to search and retrieve them. Go service + CLI."
+private: false
+default_branch: "main"
+default_delete_branch_after_merge: true
+default_merge_style: "squash"
+branch_protection:
+  - rule_name: "main"
+    enable_push: false
+    status_check_contexts:
+      - "ci/woodpecker/pr/pre-commit"
+      - "ci/woodpecker/pr/test"
+      - "ci/woodpecker/pr/build"
+    approval_whitelist_users:
+      - "benvin"