Make payload/output offloading threshold size and other limits customizable

[ericallam]

Right now everything is hardcoded, but we really need to make these env vars and document them for self-hosters:

trigger.dev/packages/core/src/v3/limits.ts

Lines 3 to 11 in 04645e8

	export const OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT = 256;
	export const OTEL_LOG_ATTRIBUTE_COUNT_LIMIT = 256;
	export const OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT = 1028;
	export const OTEL_LOG_ATTRIBUTE_VALUE_LENGTH_LIMIT = 1028;
	export const OTEL_SPAN_EVENT_COUNT_LIMIT = 10;
	export const OTEL_LINK_COUNT_LIMIT = 2;
	export const OTEL_ATTRIBUTE_PER_LINK_COUNT_LIMIT = 10;
	export const OTEL_ATTRIBUTE_PER_EVENT_COUNT_LIMIT = 10;
	export const OFFLOAD_IO_PACKET_LENGTH_LIMIT = 128 * 1024;

[askadityapandey]

Can I work on this one? The Project seems pretty cool.