Recognize commercial parts with alphabetic names in .asm scanning

Pro-E numeric codes cover most components, but parts downloaded as STEP
from online catalogs (rings, bushings, knobs...) get alphabetic Creo names
with no predictable shape. Add a second extraction path that tokenizes the
binary generically and validates candidates against the known codes in
cad_index.db, applying the same placement/occurrence rule used for bare
numeric codes. Numeric extraction is unchanged, so missing-from-index
reporting for renamed/moved Pro-E codes still works.

Also load all known prt/asm codes once per scan instead of one query per
candidate, in both RisolviAlberoComponenti and VerificaCompletezzaAssiemi.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

scripts/Query.cs

@@ -0,0 +1,18 @@
+#:package Microsoft.Data.Sqlite@10.0.12
+// dotnet run scripts/Query.cs -- <cad_index.db> <sql>
+using Microsoft.Data.Sqlite;
+
+using var connection = new SqliteConnection($"Data Source={args[0]};Mode=ReadOnly");
+connection.Open();
+using var command = connection.CreateCommand();
+command.CommandText = args[1];
+using var reader = command.ExecuteReader();
+int righe = 0;
+while (reader.Read())
+{
+    righe++;
+    var valori = Enumerable.Range(0, reader.FieldCount).Select(i => reader.IsDBNull(i) ? "" : reader.GetValue(i).ToString());
+    Console.WriteLine(string.Join(" | ", valori));
+}
+Console.WriteLine($"({righe} righe)");
+return 0;