feat: production MCP server with Israeli legislation (multi-source)

Complete production implementation with shell+adapter architecture,
13 MCP tools, SQLite FTS5 search, and multi-source ingestion pipeline.

Ingestion fetches from UCI mirror, UNODC SHERLOC PDFs, and Knesset
mobile PDFs (135 provisions, 33 definitions). 3 acts with full text,
7 acts metadata-only due to gov.il/nevo.co.il access restrictions.
Knesset OData API used for metadata enrichment.

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

src/tools/about.ts

@@ -0,0 +1,55 @@
+/**
+ * about -- Server metadata, dataset statistics, and provenance.
+ */
+
+import type Database from '@ansvar/mcp-sqlite';
+import { detectCapabilities, readDbMetadata } from '../capabilities.js';
+import { SERVER_NAME, SERVER_VERSION, REPOSITORY_URL } from '../constants.js';
+
+export interface AboutContext {
+  version: string;
+  fingerprint: string;
+  dbBuilt: string;
+}
+
+function safeCount(db: InstanceType<typeof Database>, sql: string): number {
+  try {
+    const row = db.prepare(sql).get() as { count: number } | undefined;
+    return row ? Number(row.count) : 0;
+  } catch {
+    return 0;
+  }
+}
+
+export function getAbout(db: InstanceType<typeof Database>, context: AboutContext) {
+  const caps = detectCapabilities(db);
+  const meta = readDbMetadata(db);
+
+  return {
+    server: SERVER_NAME,
+    version: context.version,
+    repository: REPOSITORY_URL,
+    database: {
+      fingerprint: context.fingerprint,
+      built_at: context.dbBuilt,
+      tier: meta.tier,
+      schema_version: meta.schema_version,
+      capabilities: [...caps],
+    },
+    statistics: {
+      documents: safeCount(db, 'SELECT COUNT(*) as count FROM legal_documents'),
+      provisions: safeCount(db, 'SELECT COUNT(*) as count FROM legal_provisions'),
+      definitions: safeCount(db, 'SELECT COUNT(*) as count FROM definitions'),
+      eu_documents: safeCount(db, 'SELECT COUNT(*) as count FROM eu_documents'),
+      eu_references: safeCount(db, 'SELECT COUNT(*) as count FROM eu_references'),
+    },
+    data_source: {
+      name: 'Knesset Legislation Database',
+      authority: 'The Knesset (Israeli Parliament)',
+      url: 'https://main.knesset.gov.il/Activity/Legislation',
+      license: 'Government Open Data',
+      jurisdiction: 'IL',
+      languages: ['he', 'en'],
+    },
+  };
+}