feat(kb): bulk-fetch תקנות הביטוח הלאומי from Wikisource

Extends scripts/fetch_national_insurance_law.py with a --regulations mode
that pulls all canonical (non-redirect) תקנות הביטוח הלאומי pages from the
MediaWiki API and writes <slug>.txt + <slug>.txt.meta.json pairs ready for
the existing scan-inbox cron.

Used to seed the live insurance KB with 92 regulations (~1,500 chunks,
~22MB Postgres) on dev. Wikisource's redirect graph dedups spelling
variants (קיצבה/קצבה, etc.) for free.

Bumps version to 0.2.0.

Refs Task Master #3

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.taskmaster/tasks/tasks.json

@@ -24,16 +24,28 @@
         "priority": "high",
         "subtasks": [],
         "updatedAt": "2026-04-21T00:00:00.000Z"
+      },
+      {
+        "id": "3",
+        "title": "Add תקנות הביטוח הלאומי (~100 regulations) from Wikisource to KB",
+        "description": "Extend scripts/fetch_national_insurance_law.py to bulk-fetch ~100 regulation pages from Hebrew Wikisource via MediaWiki API. Output text + sidecar JSON pairs to /tmp/regulations/. Upload to MinIO inbox/regulation/ for the existing scan-inbox cron to embed via Voyage. Estimated 30-40MB Postgres growth, ~$0.36 embedding cost. Sample 3 first (small/medium/large), verify chunker output, then bulk.",
+        "details": "",
+        "testStrategy": "",
+        "status": "done",
+        "dependencies": [],
+        "priority": "high",
+        "subtasks": [],
+        "updatedAt": "2026-04-25T20:39:11.905Z"
       }
     ],
     "metadata": {
       "version": "1.0.0",
-      "lastModified": "2026-04-21T00:00:00.000Z",
-      "taskCount": 2,
-      "completedCount": 0,
+      "lastModified": "2026-04-25T20:39:11.905Z",
+      "taskCount": 3,
+      "completedCount": 1,
       "tags": [
         "master"
       ]
     }
   }
-}
+}