Update coverage

Add working proof of concept

Update coverage and tests

Refactor and fix tests

Add test to the SnapController.test.ts and refactor

Update coverage thresholds

Add endowment:extend-runtime specification builder

Update shasum of examples

Code refactoring and improvements (1)

Update coverage thresholds (increase)

Rename endowment (longRunningJob => extendRuntime)

Refactor the names of the timer events and similar

Update examples shasum

Minor endowment refactoring

Add mechanism for resuming the timer of snaps that does not return in time

Fix unit test

Add some security mechanisms to prevent multiple calls

Small refactoring

Update shasums after rebase

Update coverage thresholds

Add new endowment to hardening tests

Add mechanism to prevent endowment to be used multiple times per one request

Update coverage thresholds

Update after rebase

Update tests and logic