First suggestion on the structure of input files

ultet/examples/database/src/main/my_schema/_internal_function.sql

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+/*
+ * Copyright 2023 ABSA Group Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+-- owner: some_owner_user
+-- database: example_db ( user_for_access )
+CREATE OR REPLACE FUNCTION my_schema._internal_function(
+    IN  i_parameter         TEXT,
+    OUT status              INTEGER,
+    OUT status_text         TEXT
+) RETURNS record AS
+$$
+-------------------------------------------------------------------------------
+--
+-- Function: my_schema._internal_function([Function_Param_Count])
+--      [Description]
+--
+-- Parameters:
+--      i_parameter         -
+--
+-- Returns:
+--      status              - Status code
+--      status_text         - Status text
+--
+-- Status codes:
+--      10                  - OK
+--
+-------------------------------------------------------------------------------
+DECLARE
+BEGIN
+
+END;
+$$
+LANGUAGE plpgsql VOLATILE SECURITY DEFINER;

ultet/examples/database/src/main/my_schema/dbowner.txt

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+some_owner_user

ultet/examples/database/src/main/my_schema/my_table.yaml

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+#
+# Copyright 2023 ABSA Group Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+table: my_schema.my_table
+description: This is an example table
+primary_db: example_db
+owner: some_owner_user
+columns:
+- id_key_field:
+    type: bigint
+    not_null: true
+    description: Skype username
+- some_name:
+    type: text
+    not_null: false
+    description: Aggregation name
+- item_tags:
+    type: text[]
+    not_null: true
+    description: Array of values
+primary_key:
+  pk_my_table:
+    columns: [id_key_field]
+indexes:
+    idx_some_name:
+        columns: [some_name]

ultet/examples/database/src/main/my_schema/public_function.sql

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+/*
+ * Copyright 2023 ABSA Group Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+-- owner: some_owner_user
+-- database: example_db ( user_for_access )
+CREATE OR REPLACE FUNCTION my_schema.public_function(
+    IN  i_parameter         TEXT,
+    OUT status              INTEGER,
+    OUT status_text         TEXT
+) RETURNS record AS
+$$
+-------------------------------------------------------------------------------
+--
+-- Function: my_schema.public_function([Function_Param_Count])
+--      [Description]
+--
+-- Parameters:
+--      i_parameter         -
+--
+-- Returns:
+--      status              - Status code
+--      status_text         - Status text
+--
+-- Status codes:
+--      10                  - OK
+--
+-------------------------------------------------------------------------------
+DECLARE
+BEGIN
+
+END;
+$$
+LANGUAGE plpgsql VOLATILE SECURITY DEFINER;