fix: Count today's releases via Gitea API instead of local git tags

User asked why every release tonight had the same "sequence number"
(quant_20260711.1.*) despite creating three of them. Confirmed via
API: tags b7591fb, 6ab270f, and e49922e all exist for 2026-07-11, all
claiming to be deploy #1.

Root cause: `actions/checkout@v4` (no fetch-depth/fetch-tags options)
does a shallow, tags-less clone by default. Each prepare-release.yml
run happens in a brand-new container, so `git tag -l "quant_${TODAY}.*"`
always sees zero local tags regardless of how many releases actually
exist -- DEPLOY_COUNT was permanently stuck at 0+1=1.

Fix: query GET /repos/{repo}/tags via the Gitea API (same token/curl
pattern already used elsewhere in this workflow) to count today's
actual tags, instead of relying on the job's local, incomplete git
state.

.gitea/workflows/prepare-release.yml

@@ -31,6 +31,8 @@ jobs:
 
       - name: Generate Metadata
         id: metadata
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
         run: |
           VERSION_INPUT="${{ github.event.inputs.version }}"
           COMMIT=$(git rev-parse --short HEAD)
@@ -39,8 +41,18 @@ jobs:
           if [ -z "$VERSION_INPUT" ]; then
             TODAY=$(TZ=UTC date +%Y%m%d)
 
-            # Count releases for today
-            RELEASES_TODAY=$(git tag -l "quant_${TODAY}.*" | wc -l)
+            # NOTE: Do NOT count today's releases via `git tag -l` here.
+            # actions/checkout@v4 defaults to a shallow, single-branch
+            # clone that does not fetch any tags, so every job container
+            # sees zero local tags regardless of how many releases exist
+            # -- this is exactly why every release tonight came out as
+            # "quant_20260711.1.*" (three of them: b7591fb, 6ab270f,
+            # e49922e, all claiming to be deploy #1). Query the actual
+            # Gitea Releases API instead, which reflects real state.
+            RELEASES_TODAY=$(curl -sf --connect-timeout 10 --max-time 30 \
+              -H "Authorization: token ${GITEA_TOKEN}" \
+              "https://gitea.taxbaik.com/api/v1/repos/${{ github.repository }}/tags?limit=50" \
+              | jq -r --arg prefix "quant_${TODAY}." '[.[] | select(.name | startswith($prefix))] | length')
             DEPLOY_COUNT=$((RELEASES_TODAY + 1))
 
             VERSION="quant_${TODAY}.${DEPLOY_COUNT}.${COMMIT}"