Add unit tests for recovery-handler module

[nikolasdehor]

Problem

The recovery-handler.js module (720 lines) in .aios-core/core/orchestration/ has zero test coverage. This module manages automatic error recovery for the orchestration pipeline with multiple recovery strategies.

Solution

Add comprehensive unit tests covering:

• RecoveryStrategy and RecoveryResult enums — all values verified
• Error classification — transient (timeout/network), state (corruption), configuration (missing config), dependency (module not found), fatal (OOM/critical), unknown
• Strategy selection — max retries escalation, circular detection, error-type-based routing, epic criticality, autoEscalate toggle
• handleEpicFailure — attempt tracking, Error object handling, event emission, recovery result recording
• Strategy execution — RETRY_SAME_APPROACH, ROLLBACK_AND_RETRY, SKIP_PHASE, ESCALATE_TO_HUMAN, TRIGGER_RECOVERY_WORKFLOW (with/without orchestrator), unknown strategy, error catching
• Escalation — report generation with epic name, suggestions, event emission
• Suggestions — per error type (transient, state, config, dependency, unknown)
• Attempt tracking — getAttemptCount, canRetry, resetAttempts, getAttemptHistory
• Logging — getLogs, getEpicLogs filtering, orchestrator forwarding
• Clear — state reset

Test Details

• 59 tests across 13 describe blocks
• Mocks: fs-extra
• All tests passing

[nikolasdehor]

Covered by consolidated PR #426