optimize svg cache and add retry

[LawyZheng]

🚀	This description was created by Ellipsis for commit e4af622

Summary:

This PR optimizes SVG conversion by caching results and retrying failed conversions up to 3 times, introducing a new exception for handling conversion failures.

Key points:

• Added SVGConversionFailed exception in skyvern/exceptions.py for handling failed SVG conversions.
• Introduced USELESS_SVG_ATTRIBUTE and SVG_RETRY_ATTEMPT constants in skyvern/forge/agent_functions.py.
• Modified _remove_skyvern_attributes to remove unnecessary SVG attributes.
• Updated _convert_svg_to_string to retry SVG conversion up to 3 times before raising SVGConversionFailed.
• Improved logging for SVG conversion attempts and failures.

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[ellipsis-dev]

👍 Looks good to me! Reviewed everything up to e4af622 in 16 seconds

More details

• Looked at 100 lines of code in 2 files
• Skipped 0 files when reviewing.
• Skipped posting 3 drafted comments based on config settings.

1. skyvern/forge/agent_functions.py:27

• Draft comment:
  Consider adding a type hint for the element parameter.

def _remove_rect(element: Dict) -> None:

• Reason this comment was not posted:
  Confidence changes required: 50%
  The code is missing type hints for the element parameter in the _remove_rect function. Adding type hints improves code readability and helps with static analysis.

2. skyvern/forge/agent_functions.py:42

• Draft comment:
  Consider adding a type hint for the element parameter.

def _remove_skyvern_attributes(element: Dict) -> Dict:

• Reason this comment was not posted:
  Confidence changes required: 50%
  The code is missing type hints for the element parameter in the _remove_skyvern_attributes function. Adding type hints improves code readability and helps with static analysis.

3. skyvern/forge/agent_functions.py:87

• Draft comment:
  Consider adding a type hint for the element parameter.

async def _convert_svg_to_string(task: Task, step: Step, organization: Organization | None, element: Dict) -> None:

• Reason this comment was not posted:
  Confidence changes required: 50%
  The code is missing type hints for the element parameter in the _convert_svg_to_string function. Adding type hints improves code readability and helps with static analysis.

Workflow ID: wflow_K4DTpMyORurSHL83

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