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/utils/fts-query.ts

@@ -0,0 +1,52 @@
+/**
+ * FTS5 query helpers for Israel Law MCP.
+ *
+ * Handles query sanitization and variant generation for SQLite FTS5.
+ */
+
+/**
+ * Sanitize user input for safe FTS5 queries.
+ * Removes characters that have special meaning in FTS5 syntax.
+ */
+export function sanitizeFtsInput(input: string): string {
+  return input
+    .replace(/['"(){}[\]^~*:]/g, ' ')
+    .replace(/\s+/g, ' ')
+    .trim();
+}
+
+/**
+ * Build FTS5 query variants for a search term.
+ * Returns variants in order of specificity (most specific first):
+ * 1. Exact phrase match
+ * 2. All terms required (AND)
+ * 3. Prefix match on last term
+ */
+export function buildFtsQueryVariants(sanitized: string): string[] {
+  if (!sanitized || sanitized.trim().length === 0) {
+    return [];
+  }
+
+  const terms = sanitized.split(/\s+/).filter(t => t.length > 0);
+  if (terms.length === 0) return [];
+
+  const variants: string[] = [];
+
+  // Exact phrase
+  if (terms.length > 1) {
+    variants.push(`"${terms.join(' ')}"`);
+  }
+
+  // AND query
+  variants.push(terms.join(' AND '));
+
+  // Prefix match on last term (for autocomplete-like behavior)
+  if (terms.length === 1 && terms[0].length >= 3) {
+    variants.push(`${terms[0]}*`);
+  } else if (terms.length > 1) {
+    const prefix = [...terms.slice(0, -1), `${terms[terms.length - 1]}*`];
+    variants.push(prefix.join(' AND '));
+  }
+
+  return variants;
+}