Snapshot: new training tasks (balanced generation), docs

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

tasks_gen/train/G1939/spec.md

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+# 1. Goal
+The tea plantation "Highland Leaf" picks the green leaf of its tea fields in
+batches. The plantation must store every plucking batch in one database table.
+The factory office, the field book and later evaluations read this table, so
+the field names and the data types must be exact.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- One plucking batch is the green leaf of one tea field on one day.
+- The table is new and is in package $TMP. The table is client-dependent.
+- No other object uses the table yet.
+
+# 4. Contract
+- Create the database table {{P}}PLUCK in package $TMP. The table is
+transparent.
+- The table is not extensible. Delivery class A. Data maintenance is
+restricted.
+- The table has these fields, in this order:
+CLIENT, PLUCK_ID, FIELD_ID, PLUCK_DATE, TEAM_NO, LEAF_WEIGHT, LEAF_GRADE,
+MOISTURE, WITHER_MIN, PRICE_PER_KG, NOTE.
+- Key fields: CLIENT and PLUCK_ID.
+
+# 5. Business rules
+1. CLIENT is the client field of the table. Data type: client, length 3. Key
+field. Not null.
+2. PLUCK_ID is the number of the plucking batch. Data type: character, length
+10. Key field. Not null.
+3. FIELD_ID is the tea field. Data type: character, length 6. Not null.
+4. PLUCK_DATE is the day of the plucking. Data type: date, length 8. Not null.
+5. TEAM_NO is the number of the picking team. Data type: numeric text, length
+4. The field can be empty.
+6. LEAF_WEIGHT is the weight of the green leaf in kilogram. Data type: packed
+number, 13 digits, 3 decimal places. Not null.
+7. LEAF_GRADE is the grade code of the green leaf. Data type: character,
+length 2. The field can be empty.
+8. MOISTURE is the moisture of the green leaf in percent. Data type: packed
+number, 5 digits, 2 decimal places. The field can be empty.
+9. WITHER_MIN is the planned withering time in minutes. Data type: integer,
+length 10. The field can be empty.
+10. PRICE_PER_KG is the price for one kilogram of the green leaf. Data type:
+packed number, 11 digits, 2 decimal places. The field can be empty.
+11. NOTE is a short note about the batch. Data type: character, length 40.
+The field can be empty.
+12. Two batches with the same PLUCK_ID must not exist. A second insert with
+the same key must fail.
+
+# 6. Constraints
+- Release target: 8.16.
+- Coding standards: Clean ABAP.
+- Out of scope: do not create a CDS view, a class, a program or a function
+module for this task. Do not change any other object.
+
+# 7. Acceptance
+- The table is active and has no syntax error.
+- The hidden tests pass.
+- Write ABAP Unit tests in a global test class. Use CL_OSQL_TEST_ENVIRONMENT
+for the database access.