feat(ci): opt-in coverage ratchet (default OFF — closes PMAT build-system audit gap #1) - #37

shellcheck reported issue in this script: SC2086:info:17:36: Double quote to prevent globbing and word splitting

shellcheck reported issue in this script: SC2086:info:16:26: Double quote to prevent globbing and word splitting

shellcheck reported issue in this script: SC2086:info:16:14: Double quote to prevent globbing and word splitting

shellcheck reported issue in this script: SC2086:info:13:38: Double quote to prevent globbing and word splitting

shellcheck reported issue in this script: SC2086:info:12:28: Double quote to prevent globbing and word splitting

shellcheck reported issue in this script: SC2086:info:12:16: Double quote to prevent globbing and word splitting

shellcheck reported issue in this script: SC2086:info:10:43: Double quote to prevent globbing and word splitting

shellcheck reported issue in this script: SC2012:info:9:3: Use find instead of ls to better handle non-alphanumeric filenames

shellcheck reported issue in this script: SC2015:info:2:25: Note that A && B || C is not if-then-else. C may run when A is true

label "clean-room" is unknown. available labels are "windows-latest", "windows-latest-8-cores", "windows-2025", "windows-2025-vs2026", "windows-2022", "windows-11-arm", "ubuntu-slim", "ubuntu-latest", "ubuntu-latest-4-cores", "ubuntu-latest-8-cores", "ubuntu-latest-16-cores", "ubuntu-24.04", "ubuntu-24.04-arm", "ubuntu-22.04", "ubuntu-22.04-arm", "macos-latest", "macos-latest-xlarge", "macos-latest-large", "macos-26-intel", "macos-26-xlarge", "macos-26-large", "macos-26", "macos-15-intel", "macos-15-xlarge", "macos-15-large", "macos-15", "macos-14-xlarge", "macos-14-large", "macos-14", "self-hosted", "x64", "arm", "arm64", "linux", "macos", "windows". if it is a custom label for self-hosted runner, set list of labels in actionlint.yaml config file

⚠️ [actionlint] The command ran successfully and some problem was found (found 34 errors, linted 4 files), exit code: 1

157:81 [line-length] line too long (85 > 80 characters)

153:81 [line-length] line too long (84 > 80 characters)

142:81 [line-length] line too long (109 > 80 characters)

141:81 [line-length] line too long (96 > 80 characters)

126:81 [line-length] line too long (142 > 80 characters)

66:81 [line-length] line too long (254 > 80 characters)

61:81 [line-length] line too long (214 > 80 characters)

56:81 [line-length] line too long (191 > 80 characters)

51:81 [line-length] line too long (97 > 80 characters)