Mp/foundation#20
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Implements the error class hierarchy used by external API adapters (Moralis/Alchemy) to classify failures for circuit breaker and failover decisions. Includes 7 AdapterError subclasses with isBreakerable flags plus AllProvidersUnavailableError for orchestrator. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…i-provider failover Implements CircuitBreaker class with composite key (chain:network:provider), configurable failure thresholds (consecutive + rate-based), timeout-driven HALF_OPEN probing with in-flight permit tracking, and metrics reporting. Includes 36 comprehensive unit tests covering all state transitions. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…fig config type Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…emy stub Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
… binary search block-by-date Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…orts from alchemy tests Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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BWCif modifying the bitcore-wallet-client package,CLIif modifying the bitcore-cli package, etc.)