Syntax error in EventsCompactionConfig snippet in context compaction documentation

[chaotingxuan]

Describe the bug

In docs/context/compaction.md (under "Sliding window compaction", lines 73-78), the Python code snippet illustrating EventsCompactionConfig contains a syntax error: the call to EventsCompactionConfig(...) has an unclosed parenthesis, causing a SyntaxError: '(' was never closed. In addition, the snippet omits the import for EventsCompactionConfig.

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To Reproduce

Steps to reproduce the behavior:

1. Go to docs/context/compaction.md#sliding-window-compaction.
2. Inspect the Python code snippet under "Sliding window compaction":

   # (Optional) Event-based, sliding window as supplementary setting
   compaction_config = EventsCompactionConfig(
       compaction_interval=10,   # Number of turns between standard compactions
       overlap_size=2,           # Number of events to retain as overlapping context

3. Attempt to run or parse the Python snippet.
4. Observe SyntaxError: '(' was never closed.

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Expected behavior

The Python sample snippet should be syntactically valid, with the call properly closed with ) and the class imported from google.adk.apps.app.

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Screenshots

N/A (Documentation syntax error)

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Versions

• OS: macOS / Linux / Windows
• ADK version: 2.0.0
• Python version: 3.10+

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Additional context

A patch is prepared and available in attachment.

fix-context-docs-code-samples.patch

[nightcityblade]

Hi, I'd like to work on this. I'll submit a PR shortly.