DOC-6616 fixes following review

Author: andy-stark-redis

content/develop/use-cases/prefetch-cache/_index.md

@@ -95,3 +95,11 @@ The following libraries and frameworks support Redis-backed prefetch caching:
 The following guides show how to build a simple Redis-backed prefetch cache in front of a primary store of reference data. Each guide includes a runnable interactive demo that pre-loads records on startup, runs a background sync worker that applies primary-store changes to Redis within milliseconds, and lets you watch the cache stay current as records are added, updated, and deleted on the source.
 
 * [redis-py (Python)]({{< relref "/develop/use-cases/prefetch-cache/redis-py" >}})
+* [node-redis (Node.js)]({{< relref "/develop/use-cases/prefetch-cache/nodejs" >}})
+* [go-redis (Go)]({{< relref "/develop/use-cases/prefetch-cache/go" >}})
+* [Jedis (Java)]({{< relref "/develop/use-cases/prefetch-cache/java-jedis" >}})
+* [Lettuce (Java)]({{< relref "/develop/use-cases/prefetch-cache/java-lettuce" >}})
+* [StackExchange.Redis (C#)]({{< relref "/develop/use-cases/prefetch-cache/dotnet" >}})
+* [Predis (PHP)]({{< relref "/develop/use-cases/prefetch-cache/php" >}})
+* [redis-rb (Ruby)]({{< relref "/develop/use-cases/prefetch-cache/ruby" >}})
+* [redis-rs (Rust)]({{< relref "/develop/use-cases/prefetch-cache/rust" >}})

content/develop/use-cases/prefetch-cache/dotnet/PrefetchCache.cs

@@ -228,8 +228,11 @@ public List<string> Ids()
 
     public long TtlRemaining(string entityId)
     {
-        var ttl = _db.KeyTimeToLive(CacheKey(entityId));
-        return ttl is null ? -1 : (long) ttl.Value.TotalSeconds;
+        // Use Execute("TTL", ...) rather than KeyTimeToLive: the latter
+        // returns `null` for BOTH a missing key and a key without a TTL,
+        // collapsing the -2 and -1 sentinels. Execute returns the raw
+        // integer so the demo UI can show the correct value in each case.
+        return (long) _db.Execute("TTL", CacheKey(entityId));
     }
 
     public Dictionary<string, object> Stats()

content/develop/use-cases/prefetch-cache/php/_index.md

@@ -290,7 +290,7 @@ If your Redis server is running elsewhere, start the demo with the `PREFETCH_RED
 
 ### Get the source files
 
-The demo consists of seven files. Download them from the [`php` source folder](https://github.com/redis/docs/tree/main/content/develop/use-cases/prefetch-cache/php) on GitHub, or grab them with `curl`:
+The demo consists of six files. Download them from the [`php` source folder](https://github.com/redis/docs/tree/main/content/develop/use-cases/prefetch-cache/php) on GitHub, or grab them with `curl`:
 
 ```bash
 mkdir prefetch-cache-demo && cd prefetch-cache-demo

content/develop/use-cases/prefetch-cache/rust/cache.rs

@@ -278,7 +278,10 @@ impl PrefetchCache {
         let hit_rate_pct = if total == 0 {
             0.0
         } else {
-            ((1000 * hits / total) as f64) / 10.0
+            // Round-half-up to 1 decimal in floating point. Earlier
+            // `(1000 * hits / total) as f64 / 10.0` did integer division
+            // and truncated, so 2/3 came out as 66.6 instead of 66.7.
+            (1000.0 * hits as f64 / total as f64).round() / 10.0
         };
         let sync_lag_ms_avg = if sync_lag_samples == 0 {
             0.0