[Feature]: Add loop mechanism to recheck context after compression

## Problem Description

The `compressIfNeeded()` method currently returns `true` immediately after any compression strategy succeeds, **without checking if the
context still exceeds the threshold after compression**.

## Current Behavior

```java
// Strategy 1-6 are tried sequentially
if (strategy1()) return true; // Returns immediately, no recheck
if (strategy2()) return true;
...
// All strategies failed
log.warn("All compression strategies exhausted but context still exceeds threshold");
return false;

Issue Scenarios

1. Insufficient compression: Strategy 1 compresses tool calls, but context still exceeds threshold after compression