Hard batch G0022-G0026: 5/5 accepted; budget floor, CDS checks, mutation check

- generator: budget floor (2x oracle activations, 3x calls), static checks for CDS
  $parameters and UNION annotation
- harness/mutation.py: deterministic mutants of the reference; hidden tests must fail
- G0022 revalidated with harness fixes: oracle 100, null 0
- results in docs/faz1-tasarim.md 11f

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks_gen/eval/G0025/reference/t16_test.clas.abap

@@ -0,0 +1,45 @@
+CLASS {{p}}t16_test DEFINITION PUBLIC FINAL CREATE PUBLIC
+  FOR TESTING DURATION SHORT RISK LEVEL HARMLESS.
+  PRIVATE SECTION.
+    CLASS-DATA go_env TYPE REF TO if_cds_test_environment.
+    CLASS-METHODS class_setup.
+    CLASS-METHODS class_teardown.
+    METHODS setup.
+    METHODS both_sources FOR TESTING.
+    METHODS same_partner_twice FOR TESTING.
+ENDCLASS.
+
+
+CLASS {{p}}t16_test IMPLEMENTATION.
+  METHOD class_setup.
+    go_env = cl_cds_test_environment=>create( i_for_entity = '{{P}}I_PARTNER_ALL' ).
+  ENDMETHOD.
+
+  METHOD class_teardown.
+    go_env->destroy( ).
+  ENDMETHOD.
+
+  METHOD setup.
+    DATA lt_a TYPE STANDARD TABLE OF {{p}}part_a WITH EMPTY KEY.
+    DATA lt_b TYPE STANDARD TABLE OF {{p}}part_b WITH EMPTY KEY.
+    go_env->clear_doubles( ).
+    lt_a = VALUE #( ( partner_id = 'A1' name = 'One' city = 'Bonn' ) ).
+    lt_b = VALUE #( ( partner_id = 'A1' name = 'One' city = 'Bonn' )
+                    ( partner_id = 'B1' name = 'Two' city = 'Kiel' ) ).
+    go_env->insert_test_data( lt_a ).
+    go_env->insert_test_data( lt_b ).
+  ENDMETHOD.
+
+  METHOD both_sources.
+    SELECT source FROM {{p}}i_partner_all ORDER BY source INTO TABLE @DATA(lt_rows).
+    cl_abap_unit_assert=>assert_equals( exp = 3 act = lines( lt_rows ) ).
+  ENDMETHOD.
+
+  METHOD same_partner_twice.
+    SELECT source FROM {{p}}i_partner_all
+      WHERE partner_id = 'A1' ORDER BY source INTO TABLE @DATA(lt_rows).
+    cl_abap_unit_assert=>assert_equals( exp = 2 act = lines( lt_rows ) ).
+    cl_abap_unit_assert=>assert_equals( exp = 'A' act = lt_rows[ 1 ]-source ).
+    cl_abap_unit_assert=>assert_equals( exp = 'B' act = lt_rows[ 2 ]-source ).
+  ENDMETHOD.
+ENDCLASS.