@spec build_request(list(), map()) :: map()

Build a telemetry request payload from events and state.

Returns a map with session_id, platform, sdk_version, and serialized events.

@spec event_to_map(struct() | map()) :: map()

Convert a typed event struct to a wire format map.

Delegates to the appropriate to_map/1 function based on event type.

@spec platform() :: String.t()

Get the platform string (os_type/os_flavor).

Example: "unix/linux"

@spec sanitize(term()) :: term()

Sanitize a value for JSON serialization.

Converts:

• Structs to maps (via Map.from_struct)
• Atoms to strings
• Lists recursively
• Maps recursively (keys and values)
• Numbers, binaries, booleans, nil - pass through
• Everything else - inspect