Add Sprints 46-59: governance, porting foundation, and language graduation prep (Steps 689-828)

Sprints 46-58 implement the cross-language porting foundation: language-to-IR
adapters, equivalence checking, gate validation, legacy ingestion, managed/dynamic
families, low-level/logic-actor semantics, debug workflow tooling, AST-native
family tools, Rust/CPP raising tools, system-level orchestration, query family,
and porting gates. Sprint 59 adds the governance layer (policy packs, review
boards, waiver packets, ambiguity triage, decision ledger) with the
whetstone_review_porting_decision MCP tool.

Also includes: sprint plans 46-130, MCP taskitem pipeline scripts,
CLAUDE.md, docs, and full test matrix (steps 689-828).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

editor/src/debug/DebugRecoveryAdvisor.h

@@ -0,0 +1,44 @@
+#pragma once
+// Step 1531: debug recovery advisor model.
+
+#include <string>
+#include <vector>
+
+#include <nlohmann/json.hpp>
+
+struct DebugRecoveryAdvice {
+    std::string category = "generic";
+    std::vector<std::string> actions;
+};
+
+class DebugRecoveryAdvisor {
+public:
+    static DebugRecoveryAdvice advise(const std::string& stopReason) {
+        DebugRecoveryAdvice a;
+        a.category = stopReason;
+        if (stopReason == "budget_exhausted") {
+            a.actions = {
+                "Reduce context budget to tiny",
+                "Replay last checkpoint",
+                "Prioritize highest-severity target"
+            };
+        } else if (stopReason == "policy_violation") {
+            a.actions = {
+                "Rollback last patch",
+                "Constrain file scope",
+                "Re-run regression guard"
+            };
+        } else {
+            a.actions = {
+                "Capture fresh failure packet",
+                "Re-cluster failures",
+                "Escalate to guarded review"
+            };
+        }
+        return a;
+    }
+
+    static nlohmann::json toJson(const DebugRecoveryAdvice& a) {
+        return {{"category", a.category}, {"actions", a.actions}};
+    }
+};