Fix AttributeError crash from calling nonexistent warning method on StagehandLogger

[tkattkat]

Fix AttributeError crash from calling nonexistent warning method on StagehandLogger

• replaced .warning calls with .debug

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Summary by cubic

Fixed a crash caused by calling a nonexistent warning method on StagehandLogger. Replaced those calls with debug to prevent AttributeError during CDP setup, page injection, and context cleanup.

^{Written for commit fe21ee2. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

No issues found across 4 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

Architecture diagram

sequenceDiagram
    participant S as Stagehand Core
    participant C as Browser Context
    participant P as Stagehand Page
    participant L as StagehandLogger
    participant API as Browserbase API

    Note over S, L: Initialization & CDP Setup
    S->>S: init()
    alt CDP Download Setup Fails
        S->>L: CHANGED: debug("Failed to set up CDP...")
    end

    Note over P, L: Page Injection (Navigation/Lifecycle)
    P->>P: ensure_injection()
    alt TargetClosedError (Page Navigating/Closed)
        P->>L: CHANGED: debug("ensure_injection failed...", category="page")
    end

    Note over C, L: Context & Session Cleanup
    C->>C: handle_with_lock() (Cleanup remaining pages)
    opt Page Wrapper missing
        C->>L: CHANGED: debug("Could not find StagehandPage...", category="context")
    end

    S->>S: close()
    alt HTTP Client unavailable for Session Close
        S->>L: CHANGED: debug("Cannot end server session...")
    else Success path
        S->>API: DELETE /sessions/{id}
    end

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