Cricket Innings Scorer

Problem

Design CricketInningsScorer to record legal deliveries for one cricket innings and report its current score.

Requirements

Empty innings. A new scorer reports 0/0 (0 balls).
Record a delivery. Each recordDelivery call adds its runs to the run total and increments the legal-ball count once.
Count wickets. The wicket total increments once exactly when wicket is true.
Report the score. getScorecard returns <totalRuns>/<wickets> (<legalBalls> balls) using the current totals.

API

Signature	Returns	Behavior
`CricketInningsScorer()`	Not applicable	Creates a scorer with zero runs, wickets, and legal balls.
`recordDelivery(runs: integer, wicket: boolean)`	`void`	Records one legal delivery. `runs` is from 0 through 6.
`getScorecard()`	`string`	Returns the current score in the required format.

Examples

Step	Operation	Result
1	`CricketInningsScorer()`	New scorer
2	`recordDelivery(4, false)`	`void`
3	`recordDelivery(1, false)`	`void`
4	`recordDelivery(0, true)`	`void`
5	`getScorecard()`	`5/1 (3 balls)`

Constraints

0 <= runs <= 6.
At most 10,000 deliveries are recorded on one scorer.
At most 10 recorded deliveries have wicket equal to true.
All totals fit in a signed 32-bit integer.

Notes

All recorded deliveries are legal balls. Extras, players, overs, match completion, persistence, and concurrent calls are out of scope. Calls execute in order.