feat(audit): track consolidation failure retries

[wbugitlab1]

Summary

• add first-class audit operations for consolidation, extraction, compression, and summarization failures
• classify failures, dedupe same-payload bursts, and retry due retryable audit rows with 5m/15m/60m backoff before marking permanent
• surface transient/permanent failure counts in agentmemory status and add generated config docs for AGENTMEMORY_AUDIT_RETRY_ENABLED

Closes #310

Verification

• corepack pnpm exec vitest run test/audit-failures.test.ts test/graph.test.ts test/summarize.test.ts test/consolidation-pipeline.test.ts test/reflect.test.ts test/crystallize.test.ts test/skill-extract.test.ts test/compress-failures.test.ts
• corepack pnpm exec vitest run test/session-end-triggers-graph.test.ts test/reconnect-registration.test.ts
• corepack pnpm run skills:gen -- --check
• corepack pnpm test
• corepack pnpm run build
• corepack pnpm run lint
• semgrep scan --config p/default --error --metrics=off .
• gitleaks protect --staged --redact