fix(igla): remove duplicate workflow directory, enforce FROZEN_HASH, and unify L1 traceability regexes

Closes #1438

Author: gHashTag

.claude/hooks/check-l1-traceability.sh

@@ -20,10 +20,10 @@ done
 
 # Fallback if the Rust binary is not yet built (e.g. fresh clone).
 COMMIT_MSG=$(git log -1 --pretty=%B HEAD)
-if ! echo "$COMMIT_MSG" | grep -qE "(Closes|Fixes|Resolves|Reference) #[0-9]+"; then
+if ! echo "$COMMIT_MSG" | grep -qiE "(Closes?|Fixes?|Resolves?|Refs?|Updates?)\s*#[0-9]+"; then
     echo "L1 VIOLATION: Commit missing issue reference"
     echo "Commit message: $COMMIT_MSG"
-    echo "Required pattern: Closes #N | Fixes #N | Resolves #N | Reference #N"
+    echo "Required pattern: Closes #N | Fixes #N | Resolves #N | Refs #N | Updates #N"
     exit 1
 fi
 ISSUE_NUM=$(echo "$COMMIT_MSG" | grep -oE "#[0-9]+" | head -1)

.claude/settings.json

@@ -2,14 +2,18 @@
   "hooks": {
     "PreToolUse": [
       {
-        "pattern": "*",
-        "command": ".claude/hooks/check-l1-traceability.sh"
+        "matcher": "*",
+        "hooks": [
+          { "type": "command", "command": ".claude/hooks/check-l1-traceability.sh" }
+        ]
       }
     ],
     "Stop": [
       {
-        "pattern": "*",
-        "command": ".claude/hooks/stop-hook-guard.sh"
+        "matcher": "*",
+        "hooks": [
+          { "type": "command", "command": ".claude/hooks/stop-hook-guard.sh" }
+        ]
       }
     ]
   },

.github/workflows/issue-gate.yml

@@ -33,14 +33,14 @@ jobs:
         run: |
           set -euo pipefail
           FOUND=$(echo "$PR_TITLE
-          $PR_BODY" | grep -oiE '(closes|fixes|resolves) #[0-9]+' || true)
+          $PR_BODY" | grep -oiE '(Closes?|Fixes?|Resolves?|Refs?|Updates?)\s*#[0-9]+' || true)
 
           if [ -n "$FOUND" ]; then
             echo "✅ Issue gate passed: $FOUND"
           else
-            echo "::error::L1 TRACEABILITY violation: No 'Closes #N' found in PR title/body."
+            echo "::error::L1 TRACEABILITY violation: No issue reference found in PR title/body."
             echo "::error::Constitutional Law L1 requires all code changes to reference an issue."
-            echo "::error::Usage: Include 'Closes #N' in your PR title or body."
+            echo "::error::Usage: Include 'Closes #N', 'Fixes #N', 'Resolves #N', 'Refs #N', or 'Updates #N'."
             echo "::error::Example: 'feat(compiler): Add algorithm codegen placeholder\n\nCloses #42'"
             echo "::error::PR blocked. Please create an issue first, then reference it in your PR."
             exit 1