refactor(mir): Phase 139-P3-B - RoutingDecision を enum 対応 + レガシー削除

- RoutingDecision の missing_caps を Vec<CapabilityTag> に変更（型安全化）
- error_tags は to_tag() メソッドで自動生成
- 全 callsite を enum variant に修正
- capability_tags モジュール（文字列定数群）を完全削除
- 全テスト PASS（型安全性向上を確認）
- フォーマット適用

tests/normalized_joinir_min.rs

@@ -13,15 +13,15 @@ use nyash_rust::mir::join_ir::normalized::fixtures::{
     build_jsonparser_skip_ws_real_structured_for_normalized_dev,
     build_jsonparser_skip_ws_structured_for_normalized_dev,
     build_jsonparser_unescape_string_step2_min_structured_for_normalized_dev,
+    build_parse_array_min_structured_for_normalized_dev,
+    build_parse_object_min_structured_for_normalized_dev,
+    build_parse_string_composite_min_structured_for_normalized_dev,
     build_pattern2_break_fixture_structured, build_pattern2_minimal_structured,
     build_pattern3_if_sum_min_structured_for_normalized_dev,
     build_pattern3_if_sum_multi_min_structured_for_normalized_dev,
     build_pattern3_json_if_sum_min_structured_for_normalized_dev,
     build_pattern4_continue_min_structured_for_normalized_dev,
     build_pattern_continue_return_min_structured_for_normalized_dev,
-    build_parse_string_composite_min_structured_for_normalized_dev,
-    build_parse_array_min_structured_for_normalized_dev,
-    build_parse_object_min_structured_for_normalized_dev,
     build_selfhost_args_parse_p2_structured_for_normalized_dev,
     build_selfhost_if_sum_p3_ext_structured_for_normalized_dev,
     build_selfhost_if_sum_p3_structured_for_normalized_dev,

tests/normalized_joinir_min/shapes.rs

@@ -366,7 +366,8 @@ fn test_phase88_jsonparser_unescape_string_step2_min_rejects_non_const_then_i_up
     assert!(res.is_err(), "expected fail-fast panic");
     let msg = panic_message(res.err().unwrap());
     assert!(
-        msg.contains("then' branch step increment") || msg.contains("then i update of form (i + const)"),
+        msg.contains("then' branch step increment")
+            || msg.contains("then i update of form (i + const)"),
         "unexpected panic message: {}",
         msg
     );
@@ -549,7 +550,10 @@ fn test_normalized_pattern_continue_return_min_vm_bridge_direct_matches_structur
     let base = run_joinir_vm_bridge(&structured, entry, &input, false);
     let dev = run_joinir_vm_bridge(&structured, entry, &input, true);
 
-    assert_eq!(base, dev, "vm bridge mismatch for pattern continue+return min");
+    assert_eq!(
+        base, dev,
+        "vm bridge mismatch for pattern continue+return min"
+    );
 }
 
 /// Phase 89 P1: Pattern Continue + Return minimal - expected output test
@@ -580,7 +584,10 @@ fn test_parse_string_composite_min_vm_bridge_direct_matches_structured() {
     let base = run_joinir_vm_bridge(&structured, entry, &input, false);
     let dev = run_joinir_vm_bridge(&structured, entry, &input, true);
 
-    assert_eq!(base, dev, "vm bridge mismatch for parse_string composite min");
+    assert_eq!(
+        base, dev,
+        "vm bridge mismatch for parse_string composite min"
+    );
 }
 
 /// Phase 90 P0: Parse String Composite minimal - expected output test
@@ -614,7 +621,11 @@ fn test_continue_return_multi_min_returns_null_at_first_match() {
     // Tests:
     // - Refactor-A: Null literal support (returns ConstValue::Null → JoinValue::Unit)
     // - Refactor-B: Multiple return-if with same value (i==3, i==7 both return null)
-    assert_eq!(result, JoinValue::Unit, "Expected Unit (null) from first return-if at i=3");
+    assert_eq!(
+        result,
+        JoinValue::Unit,
+        "Expected Unit (null) from first return-if at i=3"
+    );
 }
 
 /// Phase Next: Parse Array minimal - vm_bridge direct vs structured

tests/phase72_phi_observation.rs

@@ -73,15 +73,12 @@ fn test_phase72_observe_phi_dst_via_builder() {
     eprintln!("{}", report.summary());
     eprintln!();
     eprintln!("Detailed breakdown:");
-    eprintln!("  - Reserved region (0-99):   {} PHI dsts", report.in_reserved);
     eprintln!(
-        "  - Param region (100-999):   {} PHI dsts",
-        report.in_param
-    );
-    eprintln!(
-        "  - Local region (1000+):     {} PHI dsts",
-        report.in_local
+        "  - Reserved region (0-99):   {} PHI dsts",
+        report.in_reserved
     );
+    eprintln!("  - Param region (100-999):   {} PHI dsts", report.in_param);
+    eprintln!("  - Local region (1000+):     {} PHI dsts", report.in_local);
     eprintln!();
 
     if report.is_all_reserved() {
@@ -89,9 +86,7 @@ fn test_phase72_observe_phi_dst_via_builder() {
         eprintln!("   → Safe to strengthen verifier with reserved region check");
     } else {
         eprintln!("⚠️  CONCLUSION: Some PHI dsts are OUTSIDE reserved region");
-        eprintln!(
-            "   → PHI dst allocation does NOT respect reserved boundary"
-        );
+        eprintln!("   → PHI dst allocation does NOT respect reserved boundary");
         eprintln!("   → Document this finding and skip verifier strengthening");
 
         if let (Some(min), Some(max)) = (report.min_val, report.max_val) {