rename gcs env variables to match use and add additional comment documentation

Author: TimidRobot

env.example

@@ -1,39 +1,19 @@
-## photos.py & photos_detail.py
-# "The flickr developer guide: https://www.flickr.com/services/developer/"
+## GCS (Google Custom Search)
 
-# FLICKR_API_KEY =
-# FLICKR_API_SECRET =
-
-
-## deviantart_scratcher.py & google_scratcher.py
+# https://developers.google.com/custom-search/v1/introduction
 # "Custom Search JSON API requires the use of an API key. An API key is a way
 # to identify your client to Google."
-# https://developers.google.com/custom-search/v1/introduction
+#
+# https://googleapis.github.io/google-api-python-client/docs/epy/index.html
+# "string, key obtained from https://code.google.com/apis/console"
 
-# GOOGLE_API_KEYS = key1, key2
+# GCS_DEVELOPER_KEY =
 
+# https://developers.google.com/custom-search/v1/reference/rest/v1/Search
 # "The identifier of an engine created using the Programmable Search Engine
 # Control Panel [https://programmablesearchengine.google.com/about/]"
-# https://developers.google.com/custom-search/v1/reference/rest/v1/Search
-
-# PSE_KEY =
-
-
-## vimeo_scratcher.py
-# "Before we set you loose on the API, we ask that you provide a little
-# information about your app. An app in this sense can be a full-featured
-# mobile application, a dynamic web page, or a three-line script. If it's
-# making API calls, it's an app."
-# https://developer.vimeo.com/api/guides/start#register-your-app
-
-# VIMEO_ACCESS_TOKEN =
-# VIMEO_CLIENT_ID =
-
-
-## youtube_scratcher.py
-# "Every request must either specify an API key (with the key parameter) [...].
-# Your API key is available in the Developer Console's API Access pane
-# [https://console.developers.google.com/] for your project."
-# https://developers.google.com/youtube/v3/docs
+#
+# https://googleapis.github.io/google-api-python-client/docs/dyn/customsearch_v1.cse.html
+# "string, The Programmable Search Engine ID to use for this request."
 
-# YOUTUBE_API_KEY =
+# GCS_CX =

scripts/1-fetched/gcs_query.py

@@ -32,8 +32,8 @@
 load_dotenv(PATHS["dotenv"])
 
 # Constants
-API_KEY = os.getenv("GOOGLE_API_KEYS")
-CX = os.getenv("CUSTOM_SEARCH_ENGINE_ID")
+DEVELOPER_KEY = os.getenv("GCS_DEVELOPER_KEY")
+CX = os.getenv("GCS_CX")
 BASE_URL = "https://www.googleapis.com/customsearch/v1"
 
 # Log the start of the script execution
@@ -46,7 +46,7 @@ def get_search_service():
     """
     LOGGER.info("Getting Google Custom Search API Service.")
     return googleapiclient.discovery.build(
-        "customsearch", "v1", developerKey=API_KEY, cache_discovery=False
+        "customsearch", "v1", developerKey=DEVELOPER_KEY, cache_discovery=False
     )