feat(contacts): Kontakt- & Firmenverwaltung implementiert

Kontakte:
- CRUD mit Soft-Delete
- Suche, Filter, Pagination
- Bulk-Import (max 1000)
- DSGVO Export & Permanent Delete
- Duplikat-Erkennung (Email)
- Tags & Custom Fields
- Marketing Consent Tracking

Firmen:
- CRUD mit Stats (Kontakte, Deals, Wert)
- Branchen-Autocomplete
- Verknüpfung mit Kontakten

Task: #9 Kontakt- & Firmenverwaltung

src/main.ts

@@ -4,6 +4,7 @@ import "@std/dotenv/load";
 // Routes
 import { authRouter } from "./routes/auth.ts";
 import { contactsRouter } from "./routes/contacts.ts";
+import { companiesRouter } from "./routes/companies.ts";
 import { dealsRouter } from "./routes/deals.ts";
 import { activitiesRouter } from "./routes/activities.ts";
 import { pipelinesRouter } from "./routes/pipelines.ts";
@@ -140,12 +141,23 @@ app.use(async (ctx, next) => {
         },
         contacts: {
           "GET /api/v1/contacts": "List contacts",
+          "GET /api/v1/contacts/stats": "Contact statistics",
+          "GET /api/v1/contacts/export": "Export contacts (DSGVO)",
           "GET /api/v1/contacts/:id": "Get contact",
           "POST /api/v1/contacts": "Create contact",
+          "POST /api/v1/contacts/import": "Bulk import contacts",
           "PUT /api/v1/contacts/:id": "Update contact",
-          "DELETE /api/v1/contacts/:id": "Delete contact",
-          "POST /api/v1/contacts/import": "Import contacts (CSV)",
-          "GET /api/v1/contacts/export": "Export contacts (DSGVO)",
+          "DELETE /api/v1/contacts/:id": "Soft delete contact",
+          "DELETE /api/v1/contacts/:id/permanent": "Permanent delete (DSGVO)",
+        },
+        companies: {
+          "GET /api/v1/companies": "List companies",
+          "GET /api/v1/companies/industries": "Get industries",
+          "GET /api/v1/companies/:id": "Get company",
+          "GET /api/v1/companies/:id/contacts": "Get company contacts",
+          "POST /api/v1/companies": "Create company",
+          "PUT /api/v1/companies/:id": "Update company",
+          "DELETE /api/v1/companies/:id": "Delete company",
         },
         deals: {
           "GET /api/v1/deals": "List deals",
@@ -185,6 +197,9 @@ app.use(authRouter.allowedMethods());
 app.use(contactsRouter.routes());
 app.use(contactsRouter.allowedMethods());
 
+app.use(companiesRouter.routes());
+app.use(companiesRouter.allowedMethods());
+
 app.use(dealsRouter.routes());
 app.use(dealsRouter.allowedMethods());