fix(rust-sdk): Correct the criteria for sending request body

[szokeasaurusrex]

This PR corrects the Rust Actix request-body documentation, which previously incorrectly stated that send_default_pii = false prevents request bodies from being sent. In fact, send_default_pii only restricts the captured content types, but does not fully prevent request bodies from being sent.

Explanation

send_default_pii is read in middleware via client.options().send_default_pii, stored in a local with_pii, and then passed as the with_pii parameter to should_capture_request_body. Inside that function, the parameter is used in the is_valid_content_type branch, where send_default_pii = false restricts body capture to exact application/json and application/x-www-form-urlencoded, while send_default_pii = true allows any content type.

should_capture_request_body also checks transfer encoding, Content-Length, and max_request_body_size; SentryMiddleware::call then checks should_capture_request_body's return value to determine whether to capture the request body. So send_default_pii affects content-type eligibility, but is not a hard on/off switch for request body capture.

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Project	Deployment	Actions	Updated (UTC)
develop-docs	Ready	Preview, Comment	Feb 10, 2026 6:12pm
sentry-docs	Ready	Preview, Comment	Feb 10, 2026 6:12pm