chore: fix shellcheck findings across migration scripts

phase6_post_check.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
+# shellcheck disable=SC2329
 
 # =============================================================================
 # phase6_post_check.sh — Verify Phase 6 (GitHub Push Mirrors) succeeded
@@ -38,6 +39,7 @@ for repo in "${REPOS[@]}"; do
   log_info "--- Checking repo: ${repo} ---"
 
   # Check 1: Push mirror exists
+  # shellcheck disable=SC2329
   check_mirror_exists() {
     local mirrors
     mirrors=$(gitea_api GET "/repos/${GITEA_ORG_NAME}/$1/push_mirrors")
@@ -49,6 +51,7 @@ for repo in "${REPOS[@]}"; do
 
   # Check 2: Latest commit SHA matches between Gitea and GitHub
   # Trigger a sync first, then compare HEAD commits
+  # shellcheck disable=SC2329
   check_commit_sync() {
     # Trigger sync
     gitea_api POST "/repos/${GITEA_ORG_NAME}/$1/push_mirrors-sync" "" >/dev/null 2>&1 || true