[-] apply non-recursive yaml dir reading, fixes #1368

[pashagolub]

replace WalkDir with filepath.Glob, those functions never intended to be recursive in the first place

[coveralls]

Coverage Report for CI Build 25111967276

Coverage decreased (-0.09%) to 83.202%

Details

• Coverage decreased (-0.09%) from the base build.
• Patch coverage: 6 uncovered changes across 2 files (11 of 17 lines covered, 64.71%).
• 10 coverage regressions across 2 files.

Uncovered Changes

File	Changed	Covered	%
internal/metrics/yaml.go	9	6	66.67%
internal/sources/yaml.go	8	5	62.5%

Coverage Regressions

10 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
internal/metrics/yaml.go	9	82.76%
internal/sources/yaml.go	1	89.83%

---

Coverage Stats

Relevant Lines:	5316
Covered Lines:	4423
Line Coverage:	83.2%
Coverage Strength:	0.95 hits per line

---

💛 - Coveralls