fix: remove duplicate itsulu_social_id field and fix CI addons path

- Remove duplicate BlogPost._inherit class from blog_schedule.py that
  redefined itsulu_social_id with invalid 'limit' parameter, causing
  'unknown parameter limit' warnings on every Odoo startup
- Use $CI_PROJECT_DIR instead of /builds/$CI_PROJECT_PATH for addons
  path in unit_tests — CI_PROJECT_DIR is the correct GitLab predefined
  variable that works across all runner types

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitlab-ci.yml

@@ -58,7 +58,7 @@ unit_tests:
     - |
       odoo -d $TEMPLATE_DATABASE \
         -i base,website,website_blog,mail,itsulu_blog_publisher \
-        --addons-path=/usr/lib/python3/dist-packages/odoo/addons,/builds/$CI_PROJECT_PATH/addons \
+        --addons-path=/usr/lib/python3/dist-packages/odoo/addons,$CI_PROJECT_DIR/addons \
         --without-demo=all --stop-after-init --db_host=$POSTGRES_HOST --db_user=$POSTGRES_USER \
         --db_password=$POSTGRES_PASSWORD
     # Install test dependencies

addons/itsulu_blog_publisher/models/blog_schedule.py

@@ -467,18 +467,3 @@ class BlogTag(models.Model):
                 result_ids.append(new_tag.id)
 
         return self.browse(result_ids)
-
-
-# ------------------------------------------------------------------ #
-# Extend blog.post with itsulu_social_id for email template access   #
-# ------------------------------------------------------------------ #
-
-class BlogPost(models.Model):
-    _inherit = 'blog.post'
-
-    itsulu_social_id = fields.One2many(
-        comodel_name='itsulu.blog.post.social',
-        inverse_name='blog_post_id',
-        string='Social Media Copy',
-        limit=1,
-    )