fix(ci): C# integration lane polls for config changes instead of using inotify

The full local gate failed four C# generated-server tests with "The configured
user limit (128) on the number of inotify instances has been reached". Each test
boots an ASP.NET host whose config watcher takes an inotify instance; on a
desktop where other programs already hold ~90 of the 128, the parallel hosts ran
out. The tests never reload config, so the lane sets
DOTNET_USE_POLLING_FILE_WATCHER=1. Rerun: 150/0.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01M1mRRB1K2WdYy82kntMQdx

Author: dmealing

scripts/integration-test.sh

@@ -60,7 +60,12 @@ run_ts() {
 
 run_csharp() {
   echo "==> C# persistence conformance"
-  dotnet test server/csharp/MetaObjects.IntegrationTests/MetaObjects.IntegrationTests.csproj || FAIL=1
+  # Each generated-server test boots an ASP.NET host, and every host's config watcher
+  # takes an inotify instance. Run in parallel on a desktop that already holds most of the
+  # per-user limit (128), they fail with "The configured user limit (128) on the number of
+  # inotify instances has been reached". The tests never reload config; poll instead.
+  DOTNET_USE_POLLING_FILE_WATCHER=1 \
+    dotnet test server/csharp/MetaObjects.IntegrationTests/MetaObjects.IntegrationTests.csproj || FAIL=1
 }
 
 run_java() {