amend! Remove hive_post_data img_url, instead extracting it from the json_metadata when it's needed

Remove hive_post_data img_url, instead extracting it from the
json_metadata when it's needed

hive/db/sql_scripts/get_post_view_by_id.sql

@@ -164,7 +164,7 @@ BEGIN
     hpd_p.permlink,
     hpd.title,
     hpd.body,
-    hivemind_app.extract_img_url_from_json_metadata(hpd.json) as img_url,
+    hivemind_app.extract_img_url_from_json_metadata(hpd.json)::character varying(1024) as img_url,
     hcd.category,
     hp.category_id,
     hp.depth,
@@ -367,7 +367,7 @@ BEGIN
     hpd_p.permlink,
     hpd.title,
     hpd.body,
-    hivemind_app.extract_img_url_from_json_metadata(hpd.json) as img_url,
+    hivemind_app.extract_img_url_from_json_metadata(hpd.json)::character varying(1024) as img_url,
     hcd.category,
     hp.category_id,
     hp.depth,