fix(ci): fix black/ruff failures, add CoC and PR template

- Fix Python formatting (sync no longer strips blank lines from .py files)
- Remove test_community_build.py (tests private sync module)
- Fix ruff warnings in test files
- Add CODE_OF_CONDUCT.md
- Add .github/PULL_REQUEST_TEMPLATE.md

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

plugins/wordpress/schemas/seo.py

@@ -6,6 +6,7 @@ Validation schemas for SEO plugin data (Yoast, RankMath, etc.).
 
 from pydantic import BaseModel, ConfigDict, Field, field_validator
 
+
 class SEOData(BaseModel):
     """Schema for SEO data (read)"""
 
@@ -23,6 +24,7 @@ class SEOData(BaseModel):
     twitter_image: str | None = Field(None, description="Twitter card image URL")
     robots: list[str] | None = Field(None, description="Robots meta tags")
 
+
 class SEOUpdate(BaseModel):
     """Schema for SEO data updates"""
 
@@ -61,6 +63,7 @@ class SEOUpdate(BaseModel):
             pass
         return v
 
+
 class YoastSEO(SEOData):
     """Yoast SEO specific data"""
 
@@ -70,6 +73,7 @@ class YoastSEO(SEOData):
     yoast_wpseo_metadesc: str | None = Field(None, description="Yoast meta description")
     yoast_wpseo_title: str | None = Field(None, description="Yoast SEO title")
 
+
 class RankMathSEO(SEOData):
     """RankMath SEO specific data"""