feat(auto-release): use unique timestamp-based tag pattern

Replace the YYYY-MM date format with a YYYYMMDDHHmmSS.run_id pattern
to guarantee unique tags and prevent conflicts when the cron schedule
triggers multiple times within the same month.

Co-authored-by: Copilot <copilot@github.com>

.gitea/workflows/auto-release.yaml

@@ -4,6 +4,7 @@ on:
   schedule:
     # Second Sunday of every month at 00:00 UTC
     - cron: "0 0 8-14 * 0"
+  workflow_dispatch: {}
 
 env:
   GIT_EMAIL: noreply@cryptic.systems
@@ -24,7 +25,7 @@ jobs:
       - name: Create and push new tag
         id: create_tag
         run: |
-          defined_tag="$(date -u +"%Y-%m")"
+          defined_tag="$(date -u +"%Y%m%d%H%M%S").${{ github.run_id }}"
 
           echo "defined_tag=${defined_tag}" >> $GITHUB_OUTPUT
           echo "New tag: ${defined_tag}"