Do not loadshed based on latency from pprof endpoints

[komuw]

• Ignore pprof endpoints when calculating latencies that inform load shedding decision.

[codecov-commenter]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (72437bf) 73.70% compared to head (deecbf0) 73.63%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #392 +/- ## ========================================== - Coverage 73.70% 73.63% -0.07% ========================================== Files 49 49 Lines 5753 5754 +1 ========================================== - Hits 4240 4237 -3 - Misses 1220 1223 +3 - Partials 293 294 +1 ``` | [Files](https://app.codecov.io/gh/komuw/ong/pull/392?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu) | Coverage Δ | | |---|---|---| | [middleware/loadshed.go](https://app.codecov.io/gh/komuw/ong/pull/392?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-bWlkZGxld2FyZS9sb2Fkc2hlZC5nbw==) | `71.73% <100.00%> (+0.31%)` | :arrow_up: | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/komuw/ong/pull/392/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu)

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