Fix infiniteSessions example to use correct property names

- Use backgroundCompactionThreshold instead of compactionThreshold.background
- Use bufferExhaustionThreshold instead of compactionThreshold.blocking
- Values are 0.0-1.0 utilization ratios, not absolute token counts
- Add note clarifying the value range

Author: patniko

docs/compatibility.md

@@ -159,14 +159,14 @@ Instead of `/compact`, configure automatic compaction:
 const session = await client.createSession({
   infiniteSessions: {
     enabled: true,
-    compactionThreshold: {
-      background: 80000,  // Compact in background at 80k tokens
-      blocking: 100000,   // Block and compact at 100k tokens
-    },
+    backgroundCompactionThreshold: 0.80,  // Start background compaction at 80% context utilization
+    bufferExhaustionThreshold: 0.95,      // Block and compact at 95% context utilization
   },
 });
 ```
 
+> **Note:** Thresholds are context utilization ratios (0.0-1.0), not absolute token counts.
+
 ## Protocol Limitations
 
 The SDK can only access features exposed through the CLI's JSON-RPC protocol. If you need a CLI feature that's not available: