feat: add deployment retention settings

[HarshMN2345]

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[greptile-apps]

Greptile Summary

This PR adds a deployment retention settings card to both the Functions and Sites settings pages. Two new Svelte 5 runes components are introduced (updateDeploymentRetention.svelte for each route), along with matching analytics enum values. The implementation correctly handles the unlimited/finite toggle, injects a custom option when the server value isn't in the preset list, validates bounds, and invalidates the relevant cache dependency on success.

Confidence Score: 5/5

Safe to merge — no logic or data-integrity issues found.

All findings are P2 style suggestions (shared-constant extraction). The core logic — toggle handling, validation, SDK calls, cache invalidation, and analytics — is correct and consistent with existing patterns in the codebase.

No files require special attention.

Important Files Changed

Filename	Overview
src/lib/actions/analytics.ts	Adds two new analytics enum values for deployment retention update events on functions and sites — straightforward and consistent with the existing pattern.
src/routes/(console)/project-[region]-[project]/functions/function-[function]/settings/updateDeploymentRetention.svelte	New Svelte 5 runes component for setting function deployment retention; correctly handles unlimited toggle, custom preset values, validation guards, analytics, and cache invalidation.
src/routes/(console)/project-[region]-[project]/sites/site-[site]/settings/updateDeploymentRetention.svelte	New Svelte 5 runes component for site deployment retention; mirrors the functions variant with appropriate SDK call differences but duplicates constants and helpers.
src/routes/(console)/project-[region]-[project]/functions/function-[function]/settings/+page.svelte	Imports and mounts the new UpdateDeploymentRetention component after UpdateBuildCommand — minimal and correct change.
src/routes/(console)/project-[region]-[project]/sites/site-[site]/settings/+page.svelte	Imports and mounts UpdateDeploymentRetention between resource limits and timeout — correct placement and consistent with functions settings structure.

_{Reviews (2): Last reviewed commit: "changed design" | Re-trigger Greptile}