Generator: pilot analysis and fixes; G0002-G0021 tasks; handover notes merged

- Static bundle checks (name length, seed type, reserved words, contract test classes,
  testclasses_file), local abaplint parser check before SAP, max_tokens, robust JSON parse
- Runner: G2 for CDS views with parameters, contract_check detail in report
- G0020 and G0013 fixed by review and revalidated (oracle 100, null 0)
- Pilot results in docs/faz1-tasarim.md 11e; handover notes merged into CLAUDE.md and docs

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

tasks_gen/eval/G0016/spec.md

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+# 1. Goal
+The program {{P}}STOCK_NET_OLD is a legacy report. It shows the net stock
+quantity for each material and plant in a period. The report is slow and hard
+to read. Write the program {{P}}STOCK_NET. The new program has the same
+selection screen and the same result as the legacy report, but the code is
+clean and the movements are read with one database access.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The table {{P}}MOVE exists in package $TMP and contains data. Fields:
+  - MOV_ID (INT4, key): the movement number.
+  - MATERIAL (CHAR 10): the material number.
+  - PLANT (CHAR 4): the plant.
+  - MOVE_DATE (DATS): the movement date.
+  - MOVE_TYPE (CHAR 2): 'GR' for a goods receipt, 'GI' for a goods issue.
+  - QUANTITY (DEC 15,3): the movement quantity.
+- The program {{P}}STOCK_NET_OLD exists in package $TMP. It is legacy code. It
+gives the correct result.
+- The class {{P}}SEED_MOVE fills the table {{P}}MOVE with data.
+
+# 4. Contract
+- Create the executable program {{P}}STOCK_NET in package $TMP.
+- Selection screen:
+  - Parameter P_FROM, type DATS, mandatory: the first movement date to include.
+  - Parameter P_TO, type DATS, mandatory: the last movement date to include.
+  - Select-option S_MATNR for the material number.
+- Show the result with CL_SALV_TABLE. The output table has these columns with
+these names: MATERIAL, PLANT, NET_QTY, MOVE_COUNT.
+
+# 5. Business rules
+1. Include a movement only if MOVE_DATE is on or after P_FROM, MOVE_DATE is on
+or before P_TO, and MATERIAL is in S_MATNR.
+2. Group the included movements by MATERIAL and PLANT.
+3. NET_QTY is the sum of QUANTITY of all included goods receipts in the group
+minus the sum of QUANTITY of all included goods issues in the group.
+4. MOVE_COUNT is the number of included movements in the group.
+5. Show one line for each material and plant that has at least one included
+movement.
+6. Sort the lines by MATERIAL in ascending order and by PLANT in ascending
+order.
+7. The result of {{P}}STOCK_NET is the same as the result of
+{{P}}STOCK_NET_OLD.
+
+# 6. Constraints
+- Release target: 8.16.
+- Coding standards: Clean ABAP. Methods have less than 40 statements. Read the
+movements with one database access. Do not use obsolete statements.
+- Out of scope: do not change the table {{P}}MOVE, the class {{P}}SEED_MOVE and
+the program {{P}}STOCK_NET_OLD.
+
+# 7. Acceptance
+- The program is active and has no syntax error.
+- The hidden tests pass.
+- Write ABAP Unit tests as local test classes in the program.