chore: fix shellcheck findings across migration scripts

phase4_post_check.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
+# shellcheck disable=SC2329
 
 # =============================================================================
 # phase4_post_check.sh — Verify Phase 4 (Repo Migration) succeeded
@@ -44,12 +45,14 @@ for repo in "${REPOS[@]}"; do
   log_info "--- Checking repo: ${repo} ---"
 
   # Check 1: Repo exists on primary
+  # shellcheck disable=SC2329
   check_repo_exists() {
     gitea_api GET "/repos/${GITEA_ORG_NAME}/$1" >/dev/null
   }
   run_check "Primary: ${GITEA_ORG_NAME}/${repo} exists" check_repo_exists "$repo"
 
   # Check 2: Repo has commits (migration imported content)
+  # shellcheck disable=SC2329
   check_commits() {
     local commits
     commits=$(gitea_api GET "/repos/${GITEA_ORG_NAME}/$1/commits?limit=1")
@@ -60,6 +63,7 @@ for repo in "${REPOS[@]}"; do
   run_check "Primary: ${repo} has commits" check_commits "$repo"
 
   # Check 3: Default branch matches GitHub source
+  # shellcheck disable=SC2329
   check_default_branch() {
     local gitea_branch github_branch
     gitea_branch=$(gitea_api GET "/repos/${GITEA_ORG_NAME}/$1" | jq -r '.default_branch')
@@ -69,12 +73,14 @@ for repo in "${REPOS[@]}"; do
   run_check "Primary: ${repo} default branch matches GitHub" check_default_branch "$repo"
 
   # Check 4: Mirror exists on Fedora
+  # shellcheck disable=SC2329
   check_mirror_exists() {
     gitea_backup_api GET "/repos/${GITEA_ADMIN_USER}/$1" >/dev/null
   }
   run_check "Fedora: ${GITEA_ADMIN_USER}/${repo} exists" check_mirror_exists "$repo"
 
   # Check 5: Mirror has mirror=true
+  # shellcheck disable=SC2329
   check_mirror_flag() {
     local is_mirror
     is_mirror=$(gitea_backup_api GET "/repos/${GITEA_ADMIN_USER}/$1" | jq -r '.mirror')