fix: stop auto sample data generation on table create

[HarshMN2345]

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Greptile Summary

This PR fixes the bug where auto sample data generation was triggered immediately on table creation. The root cause was an onMount in input.svelte that unconditionally set entityColumnSuggestions.enabled = true on cloud, causing the random-data modal to fire after every table create. The fix removes that auto-enable, threads a typed SubNavigationEvent through the navigation trigger for optimistic sidebar updates, and defers the AI column-suggestions state update until after navigation completes.

Confidence Score: 5/5

Safe to merge; only P2 findings present.

All findings are P2 style/type-safety suggestions. The core logic — removing auto-enable, optimistic sidebar update, deferred suggestions state — is correct and the navigation ordering is sound.

subNavigation.svelte — minor type cast for the optimistically inserted entity.

Important Files Changed

Filename	Overview
src/lib/stores/database.ts	Adds typed SubNavigationEvent discriminated union so the sub-navigation trigger can carry entity-creation payloads; subscriber/update signatures updated accordingly.
src/routes/(console)/project-[region]-[project]/databases/database-[database]/(entity)/views/create.svelte	Adds createdEntity flag so resetSampleFieldsConfig is skipped only on successful creation with suggestions enabled; guards $effect with !creatingEntity to prevent premature entity reset.
src/routes/(console)/project-[region]-[project]/databases/database-[database]/(suggestions)/input.svelte	Removes the onMount that auto-set $entityColumnSuggestions.enabled = true on cloud; this is the core fix stopping automatic sample-data generation on table create.
src/routes/(console)/project-[region]-[project]/databases/database-[database]/+layout.svelte	Captures shouldSuggestColumns before creation, adds invalidate(Dependencies.TABLES), replaces the immediate random-data modal trigger with a subNavigation event + deferred entityColumnSuggestions update for post-navigation AI column suggestions.
src/routes/(console)/project-[region]-[project]/databases/database-[database]/subNavigation.svelte	Optimistically inserts the new entity into the sidebar list on entity-created events, avoiding a redundant loadEntities() round-trip; minor type-cast concern for the partial entity object.

_{Reviews (4): Last reviewed commit: "format" | Re-trigger Greptile}