Fix cloud mode: ERB secrets, Redis auth, and Redis URL

- secrets.rb: Process ERB tags in secrets.yml and use ||= to not
  overwrite existing ENV vars (was clobbering SERVER_MODE=cloud with
  literal ERB string, causing app to fall into 'application' mode
  and redirect to /en/activate)
- license.rb: Use ENV['REDIS_URL'] for all Redis.new calls instead
  of defaulting to localhost (infrastructure Redis requires auth)
- redis.yml: Use ERB to read REDIS_URL env var for production
- sidekiq.rb: Process ERB when loading redis.yml

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/models/license.rb

@@ -37,7 +37,7 @@ class License
     cache_license = nil
 
     ##Get redis connection from connection pool
-    redis = Redis.new
+    redis = Redis.new(url: ENV['REDIS_URL'])
     cache_license = redis.get(cache_key)
 
     Rails.logger.info "Cache key - " + cache_key.to_s
@@ -54,7 +54,7 @@ class License
 
         #Rails.logger.info "License - " + response.parsed_response.to_s
 
-        redis = Redis.new
+        redis = Redis.new(url: ENV['REDIS_URL'])
         redis.set(cache_key, Marshal.dump(@license))
         # redis.sadd("License:cache:keys", cache_key)
         # Redis.current do |conn|
@@ -110,7 +110,7 @@ class License
 
         # if cache_license.nil?
         cache = {"shop" => @activate["shop_name"], "key" => aes_key, "iv" => @activate["iv_key"], "renewable_date" => @activate["renewable_date"] }
-        redis = Redis.new
+        redis = Redis.new(url: ENV['REDIS_URL'])
         redis.set(cache_key, Marshal.dump(cache))
         # end
 
@@ -308,14 +308,14 @@ class License
       cache_license = nil
 
       ##Get redis connection from connection pool
-      redis = Redis.new
+      redis = Redis.new(url: ENV['REDIS_URL'])
       cache_license = redis.get(cache_key)
 
        Rails.logger.info "Cache key - " + cache_key.to_s
 
       if cache_license.nil?
         cache = {"shop" => shop_name, "key" => @data["secret_key"], "iv" => @data["iv_key"], "renewable_date" => @data["renewable_date"] }
-        redis = Redis.new
+        redis = Redis.new(url: ENV['REDIS_URL'])
         redis.set(cache_key, Marshal.dump(cache))
       end
       return true
@@ -332,7 +332,7 @@ class License
     cache_key = "shop:#{shop.chomp}"
 
     ##Get redis connection from connection pool
-    redis = Redis.new
+    redis = Redis.new(url: ENV['REDIS_URL'])
     cache_shop = redis.get(cache_key)
 
     puts Marshal.load(cache_shop)