feat(db): PostgreSQL + PBKDF2 Password Hashing

- PostgreSQL 16 Schema (12 Tabellen)
- Multi-Tenant mit org_id
- 40+ Performance Indexes
- Full-Text Search für Kontakte
- DSGVO Audit Logging
- PBKDF2 statt Argon2 (Web Crypto API)
- Auto-Update Triggers
- Views für Pipeline & Activity Stats

Deployed: https://api.crm.kronos-soulution.de

deno.json

@@ -2,9 +2,9 @@
   "name": "pulse-crm-backend",
   "version": "0.1.0",
   "tasks": {
-    "dev": "deno run --allow-net --allow-env --allow-read --allow-ffi --watch src/main.ts",
-    "start": "deno run --allow-net --allow-env --allow-read --allow-ffi src/main.ts",
-    "test": "deno test --allow-net --allow-env --allow-read --allow-ffi",
+    "dev": "deno run --allow-net --allow-env --allow-read --watch src/main.ts",
+    "start": "deno run --allow-net --allow-env --allow-read src/main.ts",
+    "test": "deno test --allow-net --allow-env --allow-read",
     "check": "deno check src/main.ts",
     "lint": "deno lint",
     "fmt": "deno fmt",
@@ -16,7 +16,6 @@
     "@std/dotenv": "jsr:@std/dotenv@^0.225.0",
     "postgres": "https://deno.land/x/postgres@v0.19.3/mod.ts",
     "zod": "https://deno.land/x/zod@v3.22.4/mod.ts",
-    "argon2": "https://deno.land/x/argon2@v0.10.1/lib/mod.ts",
     "djwt": "https://deno.land/x/djwt@v3.0.2/mod.ts"
   },
   "compilerOptions": {