[Foundation] Effect-TS: Error layer, Schema layer, shared utilities

[Soushi888]

Summary

Foundation layer for the Effect-TS 7-layer architecture (Epic #7). Implements Layer 4 (Error) and Layer 3 (Schema) — the only layers with no DHT dependencies — plus the shared utilities ported from Requests & Offers that all subsequent domain layers depend on.

Implemented by PR #89.

Scope

Layer 4 — Error

• errors/person.errors.ts — PersonError extends Data.TaggedError
• errors/resource.errors.ts — ResourceError extends Data.TaggedError
• errors/governance.errors.ts — GovernanceError + WorkflowError extends Data.TaggedError (carries step, rejected_reasons)
• errors/ppr.errors.ts — PPRError extends Data.TaggedError
• errors/error-contexts.ts — PERSON_CONTEXTS, RESOURCE_CONTEXTS, GOVERNANCE_CONTEXTS, PPR_CONTEXTS, WORKFLOW_CONTEXTS

Layer 3 — Schema

• schemas/person.schemas.ts — PersonInput, UIPerson, EncryptedProfileInput
• schemas/resource.schemas.ts — ResourceSpecInput, UIResourceSpec, EconomicResourceInput, UIEconomicResource
• schemas/governance.schemas.ts — VfActionSchema (all 16 Rust variants exactly), CommitmentInput, UICommitment, GovernanceTransitionResult
• schemas/ppr.schemas.ts — PerformanceMetrics, UIParticipationClaim, UIReputationSummary

Shared utilities (ported verbatim from Requests & Offers)

• utils/zome-helpers.ts — wrapZomeCallWithErrorFactory
• utils/effect-svelte-integration.ts — useEffectOnMount, createStoreInitializer, createEffectErrorBoundary
• utils/store-helpers/core.ts — withLoadingState, createErrorHandler
• utils/store-helpers/cache-helpers.ts — createGenericCacheSyncHelper
• utils/store-helpers/record-helpers.ts — createUIEntityFromRecord
• utils/store-helpers/event-helpers.ts — createStandardEventEmitters
• utils/store-helpers/fetching-helpers.ts — createEntityFetcher

Acceptance Criteria

• All error types implement Data.TaggedError with fromError(unknown, context) static factory
• VfActionSchema covers all 16 Rust VfAction variants — verified against zome source
• All schema classes pass bun run check
• Shared utilities are verbatim copies of R&O equivalents (no logic changes)
• bun run build passes

Part of

Epic #7