Fix coverage with several contract classes; table annotation and file path checks; clean task dir on write

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014aUaQeLnwbb1zTpN7kHeat

tasks_gen/eval/G0104/spec.md

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+# 1. Goal
+Calculate the annual premium of a car insurance policy. An insurance program calls the calculation before it sends an offer to a customer. The program needs one premium for each policy.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- Package $TMP.
+- No other objects are required.
+
+# 4. Contract
+- Create the class {{P}}INSURANCE_PREMIUM in package $TMP.
+- The class is public, final, and has a public constructor without parameters.
+- The class has the public type TY_REGION (CHAR 2) and TY_PREMIUM (P LENGTH 8 DECIMALS 2).
+- The class has one public method:
+  CALCULATE_PREMIUM
+    IMPORTING
+      iv_age              TYPE i
+      iv_power_kw         TYPE i
+      iv_region           TYPE ty_region
+      iv_claim_free_years TYPE i
+    RETURNING
+      VALUE(rv_premium)   TYPE ty_premium.
+- Do not add other public methods.
+
+# 5. Business rules
+Apply the rules in this sequence.
+1. Validate the inputs:
+   - iv_age must be between 18 and 99.
+   - iv_power_kw must be greater than 0.
+   - iv_claim_free_years must not be negative.
+   - iv_region must be one of the known regions (see rule 2).
+   If any check fails, return 0.
+2. The base premium depends on the region:
+   A1: 150, B2: 200, C3: 250, D4: 300, E5: 350.
+3. The age factor:
+   - age < 25: 1.5
+   - 25 <= age <= 65: 1.0
+   - age > 65: 1.2
+4. The power factor:
+   - power <= 50 kW: 0.9
+   - 51 <= power <= 100 kW: 1.0
+   - 101 <= power <= 150 kW: 1.3
+   - power > 150 kW: 1.6
+5. The claim-free discount:
+   - Each claim-free year gives a 5% discount.
+   - The maximum discount is 30%.
+   - The discount factor is 1 minus the discount (e.g., 0 claim-free years: 1.0, 6 or more: 0.7).
+6. Calculate the premium:
+   premium = base premium * age factor * power factor * discount factor.
+   Calculate with full precision and round the final result to 2 decimals.
+7. If the rounded premium is less than 100, return 100.
+8. Else return the rounded premium.
+
+# 6. Constraints
+- Release target: 7.58.
+- Coding standards: Clean ABAP. Method length below 40 statements. No global variables. No comment that restates the code. One statement per line.
+- Out of scope: do not create other objects.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for the class.