chore: strict-server codegen, CI improvements, remove auto-assign

.claudeignore

@@ -0,0 +1,2 @@
+internal/gen/
+go.sum

.dockerignore

@@ -4,6 +4,5 @@ docs
 .github
 dist
 compose
-internal/gen
 coverage.out
 *.sqlite

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
           fetch-depth: 1
 
       - name: Set up Go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5
+        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
           go-version-file: go.mod
 
@@ -39,7 +39,7 @@ jobs:
           fetch-depth: 1
 
       - name: Set up Go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5
+        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
           go-version-file: go.mod
 
@@ -48,6 +48,26 @@ jobs:
         with:
           version: latest
 
+  codegen-check:
+    name: codegen check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          fetch-depth: 1
+
+      - name: Set up Go
+        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
+        with:
+          go-version-file: go.mod
+
+      - name: Regenerate and check for drift
+        run: |
+          go mod download
+          make gen
+          git diff --exit-code internal/gen/
+
   docker-build:
     name: docker build
     runs-on: ubuntu-latest

.gitignore

@@ -2,9 +2,6 @@
 /api-proxy
 /dist/
 
-# generated (regenerated by `make gen`; not committed)
-/internal/gen/
-
 # env / secrets
 .env
 .env.local