fix(ci): unbreak lint workflow + fix 138 pre-existing violations

[DimitarTAtanasov]

Summary

The lint workflow has been red on every CI run since the repo was created (verified — first failure was on the initial commit). This PR fixes the root causes and brings CI to green for the first time, end-to-end verified on a fork.

Three commits, three layers of fix:

Commit	Layer	What it fixes
fix(ci): rename $args to $dockerArgs in common.ps1 Invoke-Worker	PowerShell	9 × PSAvoidAssignmentToAutomaticVariable warnings — $args is a reserved PowerShell automatic variable.
fix(ci): extract markdownlint config to a real file so the workflow runs	Workflow	The config: input to markdownlint-cli2-action@v16 expects a file path, not inline JSON. Move config to .markdownlint-cli2.jsonc (auto-discovered by the action) and drop the broken with: block.
style(docs): fix 137 pre-existing markdownlint violations	Docs	Once the workflow actually loads its config, it surfaces 137 real violations across 12 doc files. All fixed; no rules disabled.

Markdownlint breakdown (third commit)

Rule	Count	Fix
MD060 — table-column-style	96	Reformatted every table; pipes now align with header in "aligned" style. Properly handles the wide-character ✅ (East-Asian-Width = W) in README's status table.
MD040 — fenced-code-language	23	Bare triple-backtick blocks got explicit language tags. Most became text (log/error output); installation-linux.md:125 is a systemd unit so it became ini.
MD031 — blanks-around-fences	6	Auto-fixed via markdownlint-cli2 --fix.
MD022 — blanks-around-headings	4	Auto-fixed.
MD032 — blanks-around-lists	4	Auto-fixed.
MD034 — no-bare-urls	2	Auto-fixed (wrapped with <>).
MD051 — link-fragments	1	troubleshooting.md had a broken anchor pointing at #9-windows-host.docker.internal-ipv6-first; GitHub strips the periods from inline-code parts, so the correct anchor is #9-windows-hostdockerinternal-ipv6-first.
MD028 — no-blanks-blockquote	1	Two adjacent blockquotes in security.md joined with a > line in between (preserves the paragraph break visually).
MD027 — no-multiple-space-blockquote	1	README's lead blockquote had > (two spaces). Auto-fixed.
Total	137

Test plan

End-to-end verified on a fork of this repo. After pushing the branch and triggering the workflow on main:

✓ main lint · run 26274291589

✓ shellcheck         in   6s
✓ markdownlint       in   4s   ← config now loads; all 137 violations fixed
✓ PSScriptAnalyzer   in 2m54s  ← rename clears all 9 warnings on Windows runner

First green CI run in the history of this repo.

Out of scope (worth mentioning, not addressing here)

• actions/checkout@v4 and markdownlint-cli2-action@v16 use Node.js 20, which GitHub Actions runners will remove by September 2026. A follow-up PR could bump them to versions supporting Node 24; intentionally left untouched here to keep scope tight.
• windows-latest will redirect to windows-2025-vs2026 on June 15, 2026 — informational GitHub-side change, no action needed in the workflow.
• Markdownlint rule selection — I kept the exact rule set that was in the original inline config (MD013, MD024, MD033, MD041 disabled). No rules added or relaxed; the 137 fixes all happened against the rules the maintainers chose.