chore(greenhouse): makes route search validation Zod v4–ready (filter by prefix before parse)

[hodanoori]

Summary

Route search validation no longer relies on Zod’s ctx.path in z.preprocess (removed in Zod v4). A small helper filters URL search params by known keys and allowed prefixes before parsing with Zod, so the same behavior works with Zod v3 and v4.

Changes Made

• Added filterSearchParamsByPrefix(raw, knownKeys, allowedPrefixes) helper in heureka (utils.ts), supernova (lib/validateSearch.ts), and doop (lib/validateSearch.ts).
• Updated heureka /services and /vulnerabilities routes to validate search via the helper + schema (no preprocess using ctx.path).
• Updated supernova /alerts route to use the helper with ACTIVE_FILTERS_PREFIX and PAUSED_FILTERS_PREFIX.
• Updated doop /violations route to use the helper with ACTIVE_FILTERS_PREFIX.
• Typed supernova getFiltersForUrl as Record<string, string | string[]> and adjusted implementation so search param types align with the route schema.
• Removed unnecessary type assertions in carbon ErrorFallback (error already typed as Error) and in doop/supernova validate-search return values.

Related Issues

• Issue 1: [Task] (Juno): Upgrade zod from v3.x.x to v4.x.x #1221

Screenshots (if applicable)

none

Testing Instructions

1. pnpm i
2. pnpm TASK

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.
• I have created a changeset for my changes.

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