chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

models/fixtures/milestone.yml

@@ -0,0 +1,56 @@
+-
+  id: 1
+  repo_id: 1
+  name: milestone1
+  content: content1
+  is_closed: false
+  num_issues: 1
+  num_closed_issues: 0
+  completeness: 0
+  deadline_unix: 253370764800
+
+-
+  id: 2
+  repo_id: 1
+  name: milestone2
+  content: content2
+  is_closed: false
+  num_issues: 0
+  num_closed_issues: 0
+  completeness: 0
+  deadline_unix: 253370764800
+
+-
+  id: 3
+  repo_id: 1
+  name: milestone3
+  content: content3
+  is_closed: true
+  num_issues: 1
+  num_closed_issues: 0
+  completeness: 0
+  deadline_unix: 253370764800
+
+-
+  id: 4
+  repo_id: 42
+  name: milestone of repo42
+  content: content random
+  is_closed: false
+  num_issues: 0
+  num_closed_issues: 0
+  completeness: 0
+  deadline_unix: 253370764800
+
+-
+  id: 5
+  repo_id: 10
+  name: milestone of repo 10
+  content: for testing with PRs
+  is_closed: false
+  num_issues: 0
+  num_closed_issues: 0
+  completeness: 0
+  deadline_unix: 253370764800
+
+# DO NOT add more test data in the fixtures, test case should prepare their own test data separately and clearly