fix: repair Renovate config, convert Makefile to go run, update GitHub Actions (#120)

* fix: repair Renovate config and convert Makefile to go run (#117)

- Remove non-existent `github>renovatebot/presets:golang` preset that
  broke Renovate PR creation
- Replace deprecated `fileMatch` with `managerFilePatterns` in
  customManagers
- Rewrite regex to match new Makefile pattern (renovate comment above
  version variable assignment)
- Fix `matchFileNames` glob pattern (`*.mk` -> `**/*.mk`)
- Convert all tool invocations from `go install` + global binary to
  `go run tool@version` for reproducible builds
- Convert npm global tools to `npx --yes` invocations
- Remove `dev-deps` and `check-deps` targets (tools auto-download)
- Add mdformat pre-commit hook with GFM support and config
- Add `fmt-md` Makefile target for manual markdown formatting
- Update local golangci-lint pre-commit hook to use `go run`
- Apply golangci-lint v2.10.1 auto-fixes (fmt.Fprintf optimization)
- Add nolint:gosec annotations for legitimate exec.Command usage
- Exclude .serena/ from mdformat and megalinter
- Add markdown indent_size=unset in .editorconfig for CommonMark compat

* chore(deps): update GitHub Actions to latest versions

- anthropics/claude-code-action: v1.0.34 -> v1.0.64
- actions/setup-go: v6.2.0 -> v6.3.0
- actions/upload-artifact: v6.0.0 -> v7.0.0
- goreleaser/goreleaser-action: v6.4.0 -> v7.0.0
- docker/login-action: v3.6.0 -> v3.7.0
- ivuorinen/actions: v2026.01.21 -> v2026.02.24

* fix: address code review feedback

- Fix issue template YAML frontmatter (replace underscore separators
  with proper --- delimiters); exclude templates from mdformat
- Replace string(rune(n)) with strconv.Itoa(n) in test files to produce
  deterministic numeric directory names instead of Unicode characters
- Remove stale `make dev-deps` reference in README, replace with
  `make dev-setup`
- Extract ban/unban format strings into shared.MetricsFmtBanOperations
  and shared.MetricsFmtUnbanOperations constants
- Replace hardcoded coverage percentages in README with evergreen
  phrasing

* fix: address round 2 code review feedback for PR #120

- Fix corrupted path traversal example in docs/security.md
- Fix Renovate .mk regex to match nested paths (.*\.mk$)
- Update checkmake pre-commit hook to v0.3.2 to match Makefile
- Add sync.WaitGroup to unsynchronized goroutines in security tests
- Fix fmt-md target to use pre-commit run mdformat
- Pin markdownlint-cli2 to v0.21.0 in lint-md target
- Standardize //nolint:gosec to // #nosec annotations for gosec CLI

* fix(ci): install PyYAML dependency for PR lint workflow

The pr-lint workflow uses ivuorinen/actions/pr-lint which internally
calls validate-inputs running a Python script that imports yaml.
Python was set up but PyYAML was never installed, causing
ModuleNotFoundError at runtime.

* fix: address round 3 code review feedback for PR #120

- Wrap Windows-style path traversal example in backtick code span so
  backslashes render literally in docs/security.md
- Add Renovate-managed MARKDOWNLINT_CLI2_VERSION variable in Makefile
  to match the pattern used by all other tool versions

.pre-commit-config.yaml

@@ -25,13 +25,13 @@ repos:
     hooks:
       - id: golangci-lint
         name: golangci-lint
-        entry: golangci-lint run
+        entry: go run github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.10.1 run
         language: system
         types: [go]
         pass_filenames: false
 
   - repo: https://github.com/google/yamlfmt
-    rev: v0.20.0
+    rev: v0.21.0
     hooks:
       - id: yamlfmt
 
@@ -48,7 +48,7 @@ repos:
         args: [-q, -c, .markdown-link-check.json]
 
   - repo: https://github.com/rhysd/actionlint
-    rev: v1.7.9
+    rev: v1.7.11
     hooks:
       - id: actionlint
         args: ["-shellcheck="]
@@ -59,26 +59,34 @@ repos:
       - id: shfmt
 
   - repo: https://github.com/checkmake/checkmake
-    rev: 0.2.2
+    rev: v0.3.2
     hooks:
       - id: checkmake
         name: Makefile Linter
         files: ^Makefile$
 
   - repo: https://github.com/bridgecrewio/checkov.git
-    rev: "3.2.495"
+    rev: "3.2.506"
     hooks:
       - id: checkov
         args:
           - "--quiet"
 
   - repo: https://github.com/python-jsonschema/check-jsonschema
-    rev: 0.36.0
+    rev: 0.37.0
     hooks:
       - id: check-github-workflows
         args: ["--verbose"]
 
   - repo: https://github.com/editorconfig-checker/editorconfig-checker
-    rev: v3.6.0
+    rev: v3.6.1
     hooks:
       - id: editorconfig-checker
+
+  - repo: https://github.com/hukkin/mdformat
+    rev: 1.0.0
+    hooks:
+      - id: mdformat
+        additional_dependencies:
+          - mdformat-gfm
+        exclude: ^(\.serena/|\.github/ISSUE_TEMPLATE/)