Add a new module called "graceful-shutdown" to the "application-generic" library. This module includes a "ShutdownService" class that provides a timeout value for graceful shutdown. The timeout value is retrieved from the environment variable "GRACEFUL_SHUTDOWN_TIMEOUT" with a default value of 5000. This module also exports the "ShutdownService" for external use.

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This commit adds validation for the GRACEFUL_SHUTDOWN_TIMEOUT environment variable in multiple config files. The variable is now validated as a number with a default value of 5000. This ensures that the application gracefully shuts down within the specified timeout period.

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The @nestjs/common global override set to "@nestjs/common@>=10.0.0 <11.0.0": "10.4.1" is necessary to teach the API application to inject it properly to @novu/framework as a peer dependency.

Refer to #6754 (comment)