Social SDK: Add AEC dump documentation for audio debugging (#7746)

Replace placeholder info about missing audio logs with comprehensive
documentation for acoustic echo cancellation (AEC) debugging using
Client::SetAecDump. Includes usage examples, best practices, and
warnings about file sizes.

Author: markmandel

docs/discord-social-sdk/how-to/debug-log.mdx

@@ -30,8 +30,34 @@ client->AddLogCallback([](auto message, auto severity) {
 }, discordpp::LoggingSeverity::Info);
 ```
 
-:::info
-Audio logs are not included in the logs by default. We will update this guide to include audio logs in the future.
+### Audio Logging
+
+For diagnosing issues with acoustic echo cancellation (AEC), you can use the [`Client::SetAecDump`] function. This
+enables diagnostic recording of audio input and output waveform data, which can be invaluable when troubleshooting echo,
+feedback, or other audio processing problems.
+
+[`Client::SetAecDump`] Enables or disables AEC diagnostic recording. When enabled, the input and output waveform data will be written to the
+log directory (the same directory specified by [`Client::SetLogDir`]).
+
+```cpp
+// Enable AEC diagnostic recording
+client->SetAecDump(true);
+
+// ... perform voice chat operations to reproduce the issue ...
+
+// Disable AEC diagnostic recording when done
+client->SetAecDump(false);
+```
+
+**When to use:**
+- Users report echo or feedback during voice chat
+- Audio quality issues that may be related to echo cancellation
+- Testing AEC performance in different environments
+- Debugging audio processing pipeline issues
+
+:::warn
+AEC dump files can become large quickly as they contain raw waveform data. Remember to disable the diagnostic recording
+once you've captured the necessary data for analysis.
 :::
 
 --- 
@@ -62,4 +88,5 @@ Audio logs are not included in the logs by default. We will update this guide to
 
 {/* Autogenerated Reference Links */}
 [`Client::AddLogCallback`]: https://discord.com/developers/docs/social-sdk/classdiscordpp_1_1Client.html#af78996cff24a40f5dc7066beed16692c
+[`Client::SetAecDump`]: https://discord.com/developers/docs/social-sdk/classdiscordpp_1_1Client.html#a3a05b2cafaa546d915a5249c63f4059f
 [`Client::SetLogDir`]: https://discord.com/developers/docs/social-sdk/classdiscordpp_1_1Client.html#a23bd5802dfa3072201ea864ee839c001