Update prometheus buckets

Update to 0.1, 0.2, 0.3, 0.5, 0.75, 1, 1.5, 2, 3, 5 to better capture slow requestswhile focusing on the typical range

Why This Range?

Starts at 0.1s: our mean response times (285-548 ms) suggest most requests are above 0.1s, so smaller buckets like 0.005s are likely underutilized.
Fine-grained up to 1s: Buckets like 0.1, 0.2, 0.3, 0.5, 0.75, 1 provide good granularity where most requests fall.
Wider spacing for slower requests: 1.5, 2, 3, 5 capture the tail, ensuring requests up to 15s (or even 20s) are tracked explicitly.
Total Buckets: 14, reducing metric cardinality.

Update library dependencies

Update library dependencies

Stable

Using official Prometheus module

for echo v4

Update init.go

update to echo v4

for echo v3

v1.0.0

Update README.md