Prepare release 2.1.1

[FabienD]

Maintenance release: Rust dependency and docker image updates, no functional change.

CLI

• Semver-compatible bumps: tokio 1.53.1, clap 4.6.6, clap_complete 4.6.9, serde 1.0.229, serde_json 1.0.151, anyhow 1.0.104, async-trait 0.1.92, futures 0.3.34, toml 1.1.4, toml_edit 0.25.13 (38 crates in the lockfile).
• Major bumps: tabled 0.20.0 -> 0.21.0, mockall 0.14.0 -> 0.15.0. The tabled 0.21 breaking changes (Charset rework, TabSize removal, ColumnNames/RowNames split) touch no API this project uses.
• New coverage: render_items_table() extracted from exec_projects_infos() and locked down by 4 characterization tests, added before the tabled bump on code that had none. 196 -> 200 tests.

Collection

• Traefik 3.6 -> 3.7, Grafana 13.0.0 -> 13.0.2, Loki 3.6.10 -> 3.6.15, Promtail 3.6.10 -> 3.6.11.
• Promtail is capped at 3.6.11 upstream (last image published 2026-05-13, superseded by Grafana Alloy) and no longer tracks Loki releases. The version gap is intentional and documented in .env.dist. Migrating to Alloy is out of scope for this release.

Verified

• cargo test: 200 passed, both debug and --release.
• cargo build --release: no warnings attributable to this codebase.
• dctl --version reports 2.1.1; dctl infos rendering visually unchanged under tabled 0.21.
• Collection stacks started against the new images: Traefik dashboard and API both 200, Grafana /api/health reports database: ok on 13.0.2, and Promtail 3.6.11 successfully pushed log lines that were then queried back out of Loki 3.6.15 — the version gap works in practice.
• The one Traefik ERR log (ACME rejecting the placeholder user@example.com) was reproduced identically on 3.6, so it predates this bump.

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 96.87500% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.21%. Comparing base (820c2d3) to head (be8b7b6).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cli/src/command/infos.rs	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #57      +/-   ##
==========================================
+ Coverage   91.01%   91.21%   +0.19%     
==========================================
  Files          18       19       +1     
  Lines        4230     4290      +60     
==========================================
+ Hits         3850     3913      +63     
+ Misses        380      377       -3     

Flag	Coverage Δ
unittests	91.21% <96.87%> (+0.19%)	⬆️

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