fix(cleanup): resolve 9 low-priority issues (P34-P42)

P34: Remove test_sample plugin from production code
P35: Remove CompanyContact=None dead code from contact.py
P36: Change Plugin.config from Text to JSONB (model + migration 0117 + service)
P37: Add AI comment about workspace overengineering in workspace.py
P38: Add container resource limits to docker-compose.yaml
P39: Guest TTL 1800 not found — already migrated to regular users
P40: Add AI comment about missing IP/Device binding in session.py
P41: Fix Redis healthcheck to use auth password
P42: RLS migration history comment already present in alembic/env.py

app/models/contact.py

@@ -254,4 +254,4 @@ class ContactPerson(Base, TenantMixin):
 
 
 # Keep old names for backward compat during migration
-CompanyContact = None  # deprecated — replaced by ContactPerson 1:N
+

app/models/plugin.py

@@ -5,7 +5,8 @@ from __future__ import annotations
 import uuid
 from typing import Any
 
-from sqlalchemy import Boolean, Index, String, Text
+from sqlalchemy import Boolean, Index, String
+from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column
 
@@ -33,8 +34,8 @@ class Plugin(Base, TimestampMixin):
     active: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
     is_core: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
     config: Mapped[dict[str, Any] | None] = mapped_column(
-        Text,
-        nullable=True,  # JSON string for plugin configuration
+        JSONB,
+        nullable=True,  # JSONB for plugin configuration
     )
 
     # Transient attribute for response (not persisted)

app/models/session.py

@@ -2,6 +2,9 @@
 
 ⚠️ Session-Tabelle dient als audit trail. Redis ist der Runtime-Session-Store.
 Dies ist ein bewusstes Dual-System.
+
+⚠️ Sessions sind nicht an IP/Device gebunden (Design-Entscheidung).
+Bei Bedarf IP-Binding hinzufügen.
 """
 
 from __future__ import annotations

app/models/workspace.py

@@ -5,6 +5,9 @@ saved views, and dashboard widgets are visible to a user. They NEVER affect
 RBAC, ABAC, entity permissions, owner/sharing rights, tenant memberships,
 RLS policies, or actual data access rights.
 
+⚠️ 4 Workspace-Tabellen sind überdimensioniert für ein Mini-CRM aber funktional
+korrekt. Bei Gelegenheit vereinfachen.
+
 See: docs/security_kernel.md for the permission intersection rule.
 """
 

app/plugins/builtins/test_sample/__init__.py

@@ -1,56 +0,0 @@
-"""Test sample plugin for LeoCRM plugin system testing."""
-
-from __future__ import annotations
-
-from typing import Any
-
-from app.plugins.base import BasePlugin
-from app.plugins.manifest import PluginManifest
-
-
-class TestSamplePlugin(BasePlugin):
-    """A sample plugin for testing the plugin lifecycle."""
-    __test__ = False
-
-    manifest = PluginManifest(
-        name="test_sample",
-        version="1.0.0",
-        display_name="Test Sample Plugin",
-        description="A sample plugin for testing install/activate/deactivate/uninstall lifecycle.",
-        dependencies=[],
-        routes=[],
-        events=["contact.created"],
-        migrations=["0001_test_plugin.sql"],
-        permissions=[],
-    
-        author="LeoCRM Team",
-        min_app_version="1.0.0",
-        contract_version="1.0.0")
-
-    def __init__(self) -> None:
-        super().__init__()
-        self.install_called = False
-        self.activate_called = False
-        self.deactivate_called = False
-        self.uninstall_called = False
-        self.event_log: list[dict[str, Any]] = []
-
-    async def on_install(self, db, service_container) -> None:
-        self.install_called = True
-
-    async def on_activate(self, db, service_container, event_bus) -> None:
-        self.activate_called = True
-        await super().on_activate(db, service_container, event_bus)
-
-    async def on_deactivate(self, db, service_container, event_bus) -> None:
-        # Contract abmelden
-        from app.plugins.builtins.contracts import get_contract_registry
-        get_contract_registry().unregister(self.manifest.name)
-        self.deactivate_called = True
-        await super().on_deactivate(db, service_container, event_bus)
-
-    async def on_uninstall(self, db, service_container) -> None:
-        self.uninstall_called = True
-
-    async def on_contact_created(self, payload: dict[str, Any]) -> None:
-        self.event_log.append({"event": "contact.created", "payload": payload})

app/plugins/builtins/test_sample/contracts.py

@@ -1,38 +0,0 @@
-"""Public contract for the test_sample plugin.
-
-Exposes only the symbols that other builtins plugins need.
-Importers should use::
-
-    from app.plugins.builtins.contracts import get_contract
-    ts = get_contract("test_sample")
-    if ts:
-        # use ts.TestSamplePlugin
-
-instead of importing from internal modules directly.
-"""
-
-from __future__ import annotations
-
-from app.plugins.builtins.contracts import get_contract_registry
-from app.plugins.builtins.test_sample import TestSamplePlugin
-
-
-class TestSampleContract:
-    """Public API surface for the test_sample plugin."""
-
-    contract_name = "test_sample"
-
-    # ─── plugin class ───
-    TestSamplePlugin = TestSamplePlugin
-
-
-# ─── self-registration ───
-
-_contract = TestSampleContract()
-get_contract_registry().register("test_sample", _contract)
-
-
-__all__ = [
-    "TestSampleContract",
-    "TestSamplePlugin",
-]

app/plugins/builtins/test_sample/migrations/0001_test_plugin.sql

@@ -1,9 +0,0 @@
--- Test sample plugin migration: creates a test table with tenant_id
-CREATE TABLE IF NOT EXISTS test_sample_items (
-    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-    tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
-    name VARCHAR(100) NOT NULL,
-    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
-);
-
-CREATE INDEX IF NOT EXISTS ix_test_sample_items_tenant ON test_sample_items(tenant_id);

app/services/plugin_service.py

@@ -205,17 +205,12 @@ class PluginService:
     async def get_plugin_config(self, db: AsyncSession, name: str) -> dict[str, Any]:
         """Get the configuration for a plugin.
 
-        Returns the plugin's config field parsed from JSON string.
+        Returns the plugin's config field (JSONB, already parsed by SQLAlchemy).
         """
         record = await self._registry._get_plugin_record(db, name)
         if record is None:
             raise ValueError(f"Plugin '{name}' is not installed")
-        import json
-        config_str = getattr(record, "config", None) or "{}"
-        try:
-            return json.loads(config_str) if isinstance(config_str, str) else config_str or {}
-        except (json.JSONDecodeError, TypeError):
-            return {}
+        return getattr(record, "config", None) or {}
 
     async def update_plugin_config(
         self,
@@ -227,15 +222,13 @@ class PluginService:
     ) -> dict[str, Any]:
         """Update the configuration for a plugin.
 
-        Stores the config as a JSON string in the plugin's config field.
+        Stores the config directly as JSONB in the plugin's config field.
         """
-        import json
-
         record = await self._registry._get_plugin_record(db, name)
         if record is None:
             raise ValueError(f"Plugin '{name}' is not installed")
 
-        record.config = json.dumps(config)
+        record.config = config
         await db.flush()
 
         if tenant_id and user_id: