feat: update blueprint types for array-only multi-module storage

[pyramation]

Summary

Updates TypeScript blueprint types to match the multi-storage-module support added in constructive-db PR #1228.

Breaking changes:

• has_storage removed from BlueprintEntityType — now derived from storage[].length > 0
• storage changed from BlueprintStorageConfig to BlueprintStorageConfig[] (array-only, no object form)
• New storage_key field added to BlueprintStorageConfig for multi-module discrimination

Companion to: https://github.com/constructive-io/constructive-db/pull/1228

Review & Testing Checklist for Human

• Verify BlueprintStorageConfig has storage_key?: string with correct JSDoc
• Verify BlueprintEntityType.storage is BlueprintStorageConfig[] (array, not single object)
• Verify has_storage is no longer on BlueprintEntityType
• Verify b2b-storage preset description references storage array (not has_storage=true)

Notes

• The generated file also picks up some unrelated type changes (LimitWarning node types) that were already on main but not regenerated. These are not from this PR's changes.
• The LimitWarningCounterParams/LimitWarningAggregateParams/LimitWarningRateParams build errors in the generated file are pre-existing on main (node types merged but params not yet generated by the static fallback). Not introduced by this PR.

Link to Devin session: https://app.devin.ai/sessions/c0494871633d4beb91f1e16e53c776d1
Requested by: @pyramation

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