feat: v3.4.0 — OpenPanel plugin public release (42 tools)

OpenPanel product analytics plugin fully reviewed, tested, and published.
Works with both self-hosted and cloud (openpanel.dev) instances.

- 42 tools: event tracking, data export, analytics, project/client management
- All tools use public REST APIs (Track, Export, Insights, Manage)
- Client modes: write (tracking), read (analytics), root (full access)
- Service page with description, setup notes, WordPress plugin download
- Dynamic URL hints in Add Site form
- 62 unit tests
- ENABLED_PLUGINS default now includes openpanel

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

core/settings.py

@@ -3,7 +3,7 @@
 Usage:
     from core.settings import get_setting
 
-    enabled = await get_setting("ENABLED_PLUGINS", "wordpress,woocommerce,supabase")
+    enabled = await get_setting("ENABLED_PLUGINS", "wordpress,woocommerce,supabase,openpanel")
     max_sites = int(await get_setting("MAX_SITES_PER_USER", "10"))
 """
 
@@ -17,7 +17,7 @@ _cached_plugins: set[str] | None = None
 
 # Default values for all managed settings
 SETTING_DEFAULTS: dict[str, str] = {
-    "ENABLED_PLUGINS": "wordpress,woocommerce,supabase",
+    "ENABLED_PLUGINS": "wordpress,woocommerce,supabase,openpanel",
     "MAX_SITES_PER_USER": "10",
     "USER_RATE_LIMIT_PER_MIN": "30",
     "USER_RATE_LIMIT_PER_HR": "500",