updated build

Author: mccaffers

.github/workflows/build.yml

@@ -79,7 +79,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Install dependencies
-        run: sudo apt install -y libssl-dev libpq-dev
+        run: sudo apt install -y libssl-dev libpq-dev libcurl4-openssl-dev
       # Ubuntu's apt Boost (1.83 on 24.04) predates Boost.Redis, which was added
       # in Boost 1.84, so <boost/redis.hpp> is absent. Install a newer Boost.
       # Boost.Redis/Asio are header-only, so we only need the headers plus the

source/redisRunner.cpp

@@ -49,12 +49,17 @@ int RedisRunner::run(const std::string& questdbHost,
                      const std::string& redisHost,
                      int redisPort,
                      const std::string& queueKey) {
+                        
+    // Event loop that drives all async Redis I/O on this thread.
     asio::io_context ioc;
     auto conn = redis_util::makeRedisConnection(ioc, redisHost, redisPort);
 
+    // Outputs of the coroutine — filled in by the completion handler below.
     std::optional<std::string> popped;
     std::exception_ptr popError;
 
+    // Schedule popOnce() onto the io_context. When the coroutine finishes,
+    // the lambda is invoked with either an exception or the popped value.
     asio::co_spawn(
         ioc,
         popOnce(conn, queueKey),
@@ -67,6 +72,7 @@ int RedisRunner::run(const std::string& questdbHost,
             popped = std::move(r);
         });
 
+    // Block until the coroutine (and the Redis connection loop) finish.
     ioc.run();
 
     if (popError) {