Phase 4: Macro expansion in compiler

- resolve-macro: resolve symbols to macro vars via ctx
- Macro expansion in analyze-form: detects macro heads, expands, re-analyzes
- compile-ast: emits Janet data structures with resolved core fn values
- compile-and-eval uses compile-ast (no source parse roundtrip)
- eval-string routes macros through compiler (expanded at analyze time)
- Fix - mapping: core-sub (core-- doesn't exist)
- All 317 tests pass + 6 new Phase 4 macro tests

.dirge/skills/.usage.json

@@ -1,22 +1,12 @@
 {
-  "jpm-build": {
-    "created_by": "agent",
-    "use_count": 0,
-    "view_count": 11,
-    "patch_count": 0,
-    "last_viewed_at": "2026-06-02T17:43:38.327259+00:00",
-    "created_at": "2026-06-01T20:56:39.144222+00:00",
-    "state": "active",
-    "pinned": false
-  },
   "jolt-dev": {
     "created_by": "agent",
-    "use_count": 25,
-    "view_count": 36,
-    "patch_count": 31,
-    "last_used_at": "2026-06-02T19:13:37.620054+00:00",
-    "last_viewed_at": "2026-06-02T19:13:37.612317+00:00",
-    "last_patched_at": "2026-06-02T19:14:06.338745+00:00",
+    "use_count": 26,
+    "view_count": 37,
+    "patch_count": 32,
+    "last_used_at": "2026-06-02T19:38:51.833410+00:00",
+    "last_viewed_at": "2026-06-02T19:38:51.825602+00:00",
+    "last_patched_at": "2026-06-02T19:39:44.919664+00:00",
     "created_at": "2026-06-01T21:26:06.614465+00:00",
     "state": "active",
     "pinned": false
@@ -25,7 +15,8 @@
     "created_by": "agent",
     "use_count": 0,
     "view_count": 0,
-    "patch_count": 0,
+    "patch_count": 1,
+    "last_patched_at": "2026-06-02T19:40:03.526270+00:00",
     "created_at": "2026-06-02T17:54:38.690279+00:00",
     "state": "active",
     "pinned": false
@@ -41,5 +32,15 @@
     "created_at": "2026-06-01T21:49:51.101718+00:00",
     "state": "active",
     "pinned": false
+  },
+  "jpm-build": {
+    "created_by": "agent",
+    "use_count": 0,
+    "view_count": 11,
+    "patch_count": 0,
+    "last_viewed_at": "2026-06-02T17:43:38.327259+00:00",
+    "created_at": "2026-06-01T20:56:39.144222+00:00",
+    "state": "active",
+    "pinned": false
   }
 }