feat: add client_addresses table for multi-address storage

Adds client_addresses table with cascade deletes, port scoping, primary address flag, and indexes. Updates clientsRelations and portsRelations, adds clientAddressesRelations. Generates migration 0000_narrow_longshot.sql.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/db/migrations/meta/_journal.json

@@ -0,0 +1,13 @@
+{
+  "version": "7",
+  "dialect": "postgresql",
+  "entries": [
+    {
+      "idx": 0,
+      "version": "7",
+      "when": 1776185027494,
+      "tag": "0000_narrow_longshot",
+      "breakpoints": true
+    }
+  ]
+}