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/G0026/seed/rent_sample.func.abap

@@ -0,0 +1,25 @@
+FUNCTION {{p}}rent_sample
+  IMPORTING
+    iv_vehicle_class TYPE string
+    iv_minutes TYPE i
+    iv_km TYPE i
+    iv_member TYPE abap_bool
+    iv_weekend TYPE abap_bool
+  EXPORTING
+    ev_time_fee TYPE decfloat34
+    ev_distance_fee TYPE decfloat34
+    ev_surcharge TYPE decfloat34
+    ev_discount TYPE decfloat34
+    ev_total TYPE decfloat34
+  EXCEPTIONS
+    invalid_duration
+    invalid_distance
+    invalid_class.
+
+  CLEAR: ev_time_fee,
+         ev_distance_fee,
+         ev_surcharge,
+         ev_discount,
+         ev_total.
+
+ENDFUNCTION.