Feature Request: Provide a convenience view/table for counters with followers

When I have a config similar to
```
perf_event_config {
timebase {
tracepoint {
name: "sched/sched_switch"
}
period: 1
}
followers {
raw_event {
type: 12
config: 17
}
name: "CPU_CYCLES"
}
followers {
raw_event {
type: 12
config: 8
}
name: "INST_RETIRED"
}
}
```

I would like to have a table like below, including column values such as CPU_CYCLES being in deltas rather than accumulated/sampled counter value.

| ts | cpu | sched_switch | CPU_CYCLES | INST_RETIRED |
| ------------ | --- | ------------ | ---------- | ------------ |
| 891848972656 | 3 | 1 | 786603 | 2134024 |

This would allow me to calculate metrics like IPC (INST_RETIRED / CPU_CYCLES) as a new column easily.

Currently I do this with joining, grouping, hard-coded pivoting over using WINDOWed values (to calculate deltas) which seems like waste given this should be already available at perf data consumption.

Start with the perf_event_config example and the existing join, grouping, pivoting, and windowed-value approach described in the issue. Trace the perf data consumption path to find where a convenience table could be exposed. Done means the table provides timestamp, CPU, sched_switch, and follower columns as deltas, allowing IPC calculations without those manual transformations.

Written by the indexing model from the issue text.