feat: implement CI (Continuous Intelligence) autonomous engineering harness

Implements the full PRD for CI - a fully autonomous AI-driven software
engineering harness derived from Learnship's architecture.

Core components:
- CI Orchestrator agent with autonomous pipeline (SPECIFY → CLARIFY →
  RESEARCH → PLAN → EXECUTE → VERIFY → COMPLETE)
- Decision Engine with confidence thresholds (high/medium/low)
- Clarify Phase with question budget and default acceptance
- Escalation Protocol with timeout auto-proceed
- Audit Trail system (.ci/audit/) for post-hoc review
- Error Recovery with retry, plan revision, and rollback

18 agents (all Learnship agents + Orchestrator):
- Autonomous behavioral modifications per PRD §7.1
- Agent registry with factory pattern

11 CLI commands:
- ci init, ci run, ci quick, ci debug, ci verify
- ci review, ci status, ci audit, ci clarify
- ci rollback, ci ship

4-layer verification system:
- Structural, Behavioral, Security, Code Quality

3 autonomy levels: full, supervised, guided
Compatible with Learnship artifact schemas (.planning/)

src/types/escalation.ts

@@ -0,0 +1,51 @@
+export type EscalationType =
+  | "irreversible_action"
+  | "verification_failure"
+  | "low_confidence_decision"
+  | "security_escalation"
+  | "specification_ambiguity";
+
+export type EscalationResolution =
+  | "approved"
+  | "rejected"
+  | "modified"
+  | "pending"
+  | "timeout_auto_proceed";
+
+export interface EscalationOption {
+  id: string;
+  label: string;
+  description: string;
+  recommended: boolean;
+}
+
+export interface Escalation {
+  id: string;
+  timestamp: string;
+  type: EscalationType;
+  phase: string;
+  plan?: string;
+  task?: string;
+  description: string;
+  context: string;
+  options: EscalationOption[];
+  default_option_id: string;
+  resolution: EscalationResolution;
+  resolved_at?: string;
+  resolution_detail?: string;
+  audit_file: string;
+}
+
+export interface EscalationResult {
+  escalation: Escalation;
+  chosen_option_id: string;
+  timestamp: string;
+}
+
+export const ESCALATION_TYPES: Record<EscalationType, string> = {
+  irreversible_action: "Irreversible Action",
+  verification_failure: "Verification Failure",
+  low_confidence_decision: "Low Confidence Decision",
+  security_escalation: "Security Escalation",
+  specification_ambiguity: "Specification Ambiguity",
+};