chore: establish project baseline

src/gti_discovery/__init__.py

@@ -0,0 +1,22 @@
+"""Read-only Firebird discovery utilities.
+
+The lexical SQL validator is intentionally not imported here. It is an
+offline-only diagnostic utility in ``gti_discovery.read_only`` and has no
+runtime security authority.
+"""
+
+from .firebird_connection import (
+    AUTHORIZED_DATABASE_PATH,
+    connect_authorized_read_only,
+    get_database_identity,
+    validate_authorized_database_identity,
+    validate_authorized_database_path,
+)
+
+__all__ = [
+    "AUTHORIZED_DATABASE_PATH",
+    "connect_authorized_read_only",
+    "get_database_identity",
+    "validate_authorized_database_identity",
+    "validate_authorized_database_path",
+]