chore(deps): remove unused thiserror dependency

[oritwoen]

thiserror was listed in Cargo.toml but never imported anywhere in the codebase. All error handling goes through anyhow directly.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 63cc238c-eeed-4ffa-8a5a-1c85eb68d36f

📥 Commits

Reviewing files that changed from the base of the PR and between 4197b9b and 855da09.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• Cargo.toml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/remove-unused-thiserror

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch chore/remove-unused-thiserror

📝 Coding Plan

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[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

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

_{Auto-approved: This is a safe cleanup PR that removes an unused dependency (thiserror) from the project configuration with no changes to source code logic.}

Architecture diagram

sequenceDiagram
    participant User as User / External Caller
    participant Entry as Application Entry (CLI)
    participant Logic as Business Logic
    participant ErrorLib as Error Handling (anyhow)

    Note over Entry,ErrorLib: Current Error Flow (Consolidated to anyhow)

    User->>Entry: Execute Request
    Entry->>Logic: Process Data
    
    alt Failure Scenario
        Logic->>ErrorLib: NEW: wrap with .context()
        ErrorLib-->>Logic: anyhow::Error
        Logic-->>Entry: Return Result<T, anyhow::Error>
        Entry->>Entry: Format error for display
        Entry-->>User: Termination with error message
    else Success Scenario
        Logic-->>Entry: Return Ok(data)
        Entry-->>User: Return response
    end

    Note over Logic,ErrorLib: No longer utilizes thiserror for defined error types

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