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>

core/endpoints/config.py

@@ -8,6 +8,7 @@ Each endpoint has specific plugin types, scopes, and access requirements.
 from dataclasses import dataclass, field
 from enum import Enum
 
+
 class EndpointType(Enum):
     """Types of MCP endpoints"""
 
@@ -25,6 +26,7 @@ class EndpointType(Enum):
     PROJECT = "project"  # Dynamic per-project endpoint
     CUSTOM = "custom"
 
+
 @dataclass
 class EndpointConfig:
     """
@@ -90,6 +92,7 @@ class EndpointConfig:
             return True  # Empty set = all scopes
         return scope in self.allowed_scopes
 
+
 # Predefined endpoint configurations
 ENDPOINT_CONFIGS = {
     # Admin endpoint - all tools, requires Master API Key
@@ -305,12 +308,14 @@ ENDPOINT_CONFIGS = {
     ),
 }
 
+
 def get_endpoint_config(endpoint_type: EndpointType) -> EndpointConfig:
     """Get configuration for a specific endpoint type"""
     if endpoint_type not in ENDPOINT_CONFIGS:
         raise ValueError(f"Unknown endpoint type: {endpoint_type}")
     return ENDPOINT_CONFIGS[endpoint_type]
 
+
 def create_project_endpoint_config(
     project_id: str, plugin_type: str, site_alias: str | None = None
 ) -> EndpointConfig: