Authorizer: allow REINDEX/ANALYZE (fixes CREATE INDEX denial)

The last failing test, ordinarySQLIsAllowed, ran `CREATE INDEX`. SQLite
reports the index build to the authorizer as SQLITE_REINDEX, which the
default-deny branch rejected -> SQLITE_AUTH. REINDEX and ANALYZE are safe
maintenance operations on the single authorized DB file (and remain
readOnly-gated), so allow them.

https://claude.ai/code/session_01AdvNtQ7wCMVy8etacVQbjg

Author: claude

Sources/SwiftSQLiteKit/EngineContext.swift

@@ -82,7 +82,11 @@ final class EngineContext: @unchecked Sendable {
              SQLITE_DROP_INDEX, SQLITE_DROP_TEMP_INDEX,
              SQLITE_DROP_VIEW, SQLITE_DROP_TEMP_VIEW,
              SQLITE_DROP_TRIGGER, SQLITE_DROP_TEMP_TRIGGER,
-             SQLITE_ALTER_TABLE:
+             SQLITE_ALTER_TABLE,
+             // REINDEX/ANALYZE are safe maintenance on the one DB file —
+             // and CREATE INDEX reports the index build to the authorizer as
+             // SQLITE_REINDEX, so denying it breaks CREATE INDEX.
+             SQLITE_REINDEX, SQLITE_ANALYZE:
             if readOnly { return SQLITE_DENY }
             // `sqlite_schema` writes are deliberately NOT denied here:
             // legitimate DDL (CREATE/DROP/ALTER) is reported to the