docs: document encode_path_params Python generator option

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Summary

Documents encode_path_params, a new opt-in Python SDK generator flag that makes generated clients percent-encode path parameter values. Without it, a value such as ../connections reaches the URL intact and, after normalization by the HTTP client or server, can resolve to a different endpoint than the SDK method targeted (a path-traversal-style risk). Enabling it brings the Python SDK in line with the TypeScript, Go, Java, and C# generators. It ships opt-in because APIs that intentionally accept slashes inside a path parameter value will now receive %2F.

Implements docs for: feat(python): add encode_path_params config to percent-encode path parameters (fern-api/fern#17295)

Changes

• fern/products/sdks/generators/python/configuration.mdx: added an encode_path_params <ParamField> (bool, default false) alongside the neighboring config options, covering the encoding behavior and the slash-containing-value caveat.

Validation: pre-commit run --files <changed file> (no new Vale findings) and fern check --warnings (0 errors; only pre-existing warnings).

Link to Devin session: https://app.devin.ai/sessions/d4d0d61b9df44c87b58623621f6538a8

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🌿 Preview your docs: https://fern-preview-devin-1785604053-encode-path-params.docs.buildwithfern.com/learn

Here are the markdown pages you've updated:

• learn/sdks/generators/python/configuration