Decide Scheme exception pickup translation support

Support automatic ingestion of uncaught Scheme exceptions through a pickup component.

A Scheme runtime can write an exception report when a thread raises an uncaught SRFI-12 condition. The pickup component should:

• discover and attach the generated report
• translate the condition type, message, metadata, thread information, and stack frames into Sentry's standard error event format
• submit the translated event for ingestion

The Scheme program should not need to construct a Sentry payload or integrate a dedicated Scheme SDK. The requested experience is:

Scheme exception report → pickup and translation → Sentry ingestion

Initial scope is CHICKEN Scheme 5 with SRFI-12 conditions. The report format can be defined as part of the implementation because the producer can pre-process the data into the required shape.

Requested by David Quintas.

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View Junior Session Sentry

Start by locating existing pickup components and the standard error event format used for ingestion. Define the CHICKEN Scheme 5 report shape and trace how condition data, thread information, and stack frames can be translated and submitted; done means an uncaught SRFI-12 condition reaches Sentry without a Scheme SDK or manually constructed payload.