chore: release v1.0.7

Playout: slate fallback, strict ffprobe validation, Prometheus metrics
Chat: history on join, DM offline delivery, env-config rate limits,
  Redis auto-reconnect, heartbeat, ban/mute enforcement, DM metrics
Viewer: presence indicators, schedule overlay, public /api/schedule
Admin: playlist drag-reorder, schedule overrides CRUD, user actions,
  inline mod buttons, CSV export, config editor, restart buttons,
  upload normalization gate, analytics time range
nginx: CORS preflight, JSON health, stub_status
Docs: test-lab vs production distinction across all configs/docs
Infra: Redis maxmemory, CD health IP-agnostic, slate volume mount

infrastructure/nginx/nginx.conf

@@ -160,18 +160,36 @@ http {
         }
 
         location = /hls/playlist.m3u8 {
+            if ($request_method = OPTIONS) {
+                add_header Access-Control-Allow-Origin "*";
+                add_header Access-Control-Allow-Methods "GET, OPTIONS";
+                add_header Access-Control-Max-Age 86400;
+                return 204;
+            }
             alias /srv/hls/playlist.m3u8;
             add_header Cache-Control "no-store, no-cache, must-revalidate, max-age=0";
             add_header Access-Control-Allow-Origin "*";
         }
 
         location = /hls/init.mp4 {
+            if ($request_method = OPTIONS) {
+                add_header Access-Control-Allow-Origin "*";
+                add_header Access-Control-Allow-Methods "GET, OPTIONS";
+                add_header Access-Control-Max-Age 86400;
+                return 204;
+            }
             alias /srv/hls/init.mp4;
             add_header Cache-Control "public, max-age=31536000, immutable";
             add_header Access-Control-Allow-Origin "*";
         }
 
         location ~* ^/hls/(.+\.(ts|m4s))$ {
+            if ($request_method = OPTIONS) {
+                add_header Access-Control-Allow-Origin "*";
+                add_header Access-Control-Allow-Methods "GET, OPTIONS";
+                add_header Access-Control-Max-Age 86400;
+                return 204;
+            }
             alias /srv/hls/$1;
             add_header Cache-Control "public, max-age=31536000, immutable";
             add_header Access-Control-Allow-Origin "*";
@@ -179,15 +197,29 @@ http {
 
         # Local/dev fallback HLS origin. Production media should use MEDIA_DOMAIN.
         location /hls/ {
+            if ($request_method = OPTIONS) {
+                add_header Access-Control-Allow-Origin "*";
+                add_header Access-Control-Allow-Methods "GET, OPTIONS";
+                add_header Access-Control-Max-Age 86400;
+                return 204;
+            }
             alias /srv/hls/;
             add_header Cache-Control "public, max-age=60";
             add_header Access-Control-Allow-Origin "*";
         }
 
-        # Health checks
+        # Health checks — aggregated from upstream services
         location /health {
-            return 200 "healthy";
-            add_header Content-Type text/plain;
+            default_type application/json;
+            return 200 '{"status":"ok","service":"nginx","timestamp":"$time_iso8601"}';
+        }
+
+        location /nginx-status {
+            stub_status on;
+            allow 127.0.0.1;
+            allow 172.16.0.0/12;
+            allow 192.168.0.0/16;
+            deny all;
         }
     }
 }