feat(image): add gpt-image-2 single and multi-image workflows

scripts/run_openai_gpt_image2_edit.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT_DIR"
+
+declare -A PRESERVED_ENV=()
+for name in \
+  OPENAI_API_KEY \
+  OPENAI_BASE_URL \
+  IMAGE_REQUEST_STYLE \
+  IMAGE_SIZE \
+  IMAGE_RESOLUTION \
+  IMAGE_PROMPT \
+  IMAGE_MODEL \
+  IMAGE_QUALITY \
+  IMAGE_N \
+  OUTPUT_FILE \
+  REFERENCE_IMAGE \
+  REFERENCE_IMAGE_FILE \
+  REFERENCE_IMAGE_URL \
+  REFERENCE_IMAGE_DATA_URL \
+  MASK_IMAGE \
+  MASK_IMAGE_FILE \
+  MASK_IMAGE_URL \
+  MASK_IMAGE_DATA_URL \
+  IMAGE_REQUEST_TIMEOUT \
+  IMAGE_MAX_POLL_WAIT \
+  IMAGE_INITIAL_POLL_DELAY \
+  IMAGE_POLL_INTERVAL
+do
+  if [[ -v "$name" ]]; then
+    PRESERVED_ENV["$name"]="${!name}"
+  fi
+done
+
+if [[ -f .env ]]; then
+  set -a
+  source .env
+  set +a
+fi
+
+for name in "${!PRESERVED_ENV[@]}"; do
+  export "$name=${PRESERVED_ENV[$name]}"
+done
+
+unset http_proxy https_proxy all_proxy HTTP_PROXY HTTPS_PROXY ALL_PROXY
+
+export IMAGE_REQUEST_STYLE="${IMAGE_REQUEST_STYLE:-openai}"
+export IMAGE_MODEL="${IMAGE_MODEL:-gpt-image-2}"
+export IMAGE_SIZE="${IMAGE_SIZE:-1024x1024}"
+export IMAGE_REQUEST_TIMEOUT="${IMAGE_REQUEST_TIMEOUT:-900}"
+export IMAGE_MAX_POLL_WAIT="${IMAGE_MAX_POLL_WAIT:-1800}"
+export IMAGE_INITIAL_POLL_DELAY="${IMAGE_INITIAL_POLL_DELAY:-10}"
+export IMAGE_POLL_INTERVAL="${IMAGE_POLL_INTERVAL:-5}"
+
+python3 gpt_image2_generate.py "$@"