feat: pass context to get tracker fn as second arg

[manuchekhr32]

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• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

I tried to make "dynamic" tracking with nestjs metadata for multiple scenarios. For example by default I want tracker to be req.ip value, but in some cases I want it to get the value from req.body.username. For a temporary solution I find that creating individual guards for each scenario, but if I have access to ExecutionContext I can get "key" from the metadata. Something like this:

// throttler-proxy.guard.ts
protected async getTracker(req: Record<string, any>, context: ExecutionContext): Promise<string> {
    const key = this.reflector.get(ThrottlerTracker, context.getHandler())
    const tracker = req?.[key] ?? req.ip
    return tracker
}

// throttler-tracker.decorator.ts
export const ThrottlerTracker = Reflector.createDecorator<string>();

// auth.controller.ts
@Post('login')
@ThrottlerTracker('body.username')
login () { ... }

Issue Number: N/A

What is the new behavior?

Passes ExecutionContext to getTracker method as second argument. First time contributing to be honest, I hesitated to replace first param req to context.

Does this PR introduce a breaking change?

• Yes
• No

Other information

As I said it's my first time contributing hope you understand. Also not sure if it's a breaking change

[jmcdo29]

This looks like it could be useful, and a pretty simple change. Would you mind making a changeset via pnpm changeset and following the wizard for a minor change?

[manuchekhr32]

This looks like it could be useful, and a pretty simple change. Would you mind making a changeset via pnpm changeset and following the wizard for a minor change?

done ✅