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/G0021/spec.md

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+# 1. Goal
+Show all shipments in one list. The shipments come from two tables: road shipments
+and rail shipments. The list must also show the transport mode as text. A report
+and an OData service will read the list, so the union must be in the database, in
+a CDS view.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- Table {{P}}ROAD (road shipments), package $TMP. Key: SHIP_ID (CHAR 10).
+  Fields: CUST (CHAR 10, customer), KG (DEC 15,3, weight), COST (DEC 15,2).
+- Table {{P}}RAIL (rail shipments), package $TMP. Key: SHIP_ID (CHAR 10).
+  Fields: CUSTOMER (CHAR 10, customer), WEIGHT (DEC 15,3, weight),
+  FEE (DEC 15,2).
+- The two tables use different column names for the same content.
+- Both tables have data. A seed class fills them.
+
+# 4. Contract
+- Create the CDS view entity {{P}}I_SHIPMENT in package $TMP.
+- The elements have these names: SHIP_ID, CUSTOMER, SHIP_MODE, WEIGHT, COST.
+- No authorization check (#NOT_REQUIRED).
+
+# 5. Business rules
+1. The view is the union of {{P}}ROAD and {{P}}RAIL. Each row of {{P}}ROAD gives
+   one row of the view, and each row of {{P}}RAIL gives one row of the view.
+2. SHIP_MODE is the literal 'ROAD' for a row that comes from {{P}}ROAD.
+   SHIP_MODE is the literal 'RAIL' for a row that comes from {{P}}RAIL.
+3. CUSTOMER is CUST for a road shipment and CUSTOMER for a rail shipment.
+4. WEIGHT is KG for a road shipment and WEIGHT for a rail shipment.
+5. COST is COST for a road shipment and FEE for a rail shipment.
+6. A shipment with a weight that is not positive (0 or less) is not in the view.
+
+# 6. Constraints
+- Release target: 7.58.
+- Coding standards: Clean ABAP.
+- Out of scope: do not change {{P}}ROAD and {{P}}RAIL.
+
+# 7. Acceptance
+- The view is active and has no syntax error.
+- The hidden tests pass.
+- Write ABAP Unit tests with CL_CDS_TEST_ENVIRONMENT in a global test class.