MySQL Performance when using GF_DATABASE_URL

Use hex.EncodeToString to encode to hex

Using the EncodeToString function from the encoding/hex package
is much faster than calling the fmt.Sprintf with %x

Benchmark results below with the following code

func BenchmarkHexPrint(b *testing.B) {
  data := []byte("hellothere")
  for n := 0; n < b.N; n++ {
    // _ = fmt.Sprintf("%x", data)
    _ = hex.EncodeToString(data)
  }
}

name        old time/op    new time/op    delta
HexPrint-4     188ns ± 1%      99ns ± 1%  -47.40%  (p=0.008 n=5+5)

name        old alloc/op   new alloc/op   delta
HexPrint-4     64.0B ± 0%     64.0B ± 0%     ~     (all equal)

name        old allocs/op  new allocs/op  delta
HexPrint-4      2.00 ± 0%      2.00 ± 0%     ~     (all equal)

Update postgres.md

Set MaxIdleConn and MaxOpenConn when using the GF_DATABASE_URL configuration. Also added GF_DATABASE_DEBUG flag to print SQL statements and SQL execution times.
See #9784 for the details.

'Annotations' is a plural noun, so it doesn't require adding ‑s to the end of the verb

chore(docs): update the search Query Example

[bug fix] (cloudwatch) fix default alias format

- Updated the last  Search Dashboards Example , so that the Example Request and Response seem related

(cloudwatch) add period alias