chore: add pb runner troubleshooting

docs-internal/infrastructure/pegboard/TROUBLESHOOTING.md

@@ -0,0 +1,27 @@
+# Troubleshooting
+
+## Where are pegboard-manager logs?
+
+```bash
+cat /var/lib/rivet-client/logs
+```
+
+## Where are rivet-isolate-v8-runner logs?
+
+```bash
+cat /var/lib/rivet-client/runner/logs
+```
+
+## Why don't my runner logs exist?
+
+If there are no logs at `/var/lib/rivet-client/runner/logs`, the runner binary likely failed to spawn.
+
+Common causes:
+
+- The path to the binary is incorrect
+- Error loading libraries
+- The binary is not set as executable
+- The binary is for the wrong architecture
+
+Trying to manually find and run the binary usually resolves these issues.
+