cli: prepare v0.2.2 release (bump version, fold changelog)

[proofmancer]

Summary

Cuts the v0.2.2 release. Folds the [Unreleased] AVOW + chain v0.3.0 pin work plus the two follow-up PRs into a single [0.2.2] - 2026-05-26 section.

4 commits since v0.2.1 are covered:

• feat!: rename LGT to AVOW + pin chain v0.3.0 (DO NOT MERGE until chain deploys) #42, Rename LGT → AVOW everywhere + pin chain to v0.3.0. Internal Rust idents, wire-deserialize fields (drip_amount_lgt → drip_amount_avow, etc.), prose, base-unit (ulgt → uavow). Chain deps flip from branch = "main" to tag = "v0.3.0". Breaking on the wire: incompatible with the now-archived LGT-era ligate-devnet-1.
• chore: patch sov-full-node-configs to ligate-io fork (fix-forward for #42) #43, Patch sov-full-node-configs to ligate-io fork (fix-forward for feat!: rename LGT to AVOW + pin chain v0.3.0 (DO NOT MERGE until chain deploys) #42's SequencerKindConfig type mismatch).
• chore: flip ligate-devnet-1 → ligate-devnet-2 in prose #44, ligate-devnet-1 → ligate-devnet-2 prose sweep across README + example snippets + comments.
• ci(cla): add proofmancer to CLA allowlist #41, CLA allowlist for proofmancer (CI-only, intentionally omitted from release notes).

Why this release matters

Unblocks chain#333 (mocha-smoke real-TX submit), which needs an AVOW-aware cli binary downloadable as a release artifact. The smoke will pin to ligate-cli@v0.2.2 and use it to exercise the real DA submit → finalize path in CI against Mocha.

Test plan

• cargo update --workspace regenerated Cargo.lock cleanly (only ligate-cli itself bumped 0.2.1 → 0.2.2; 43 transitive deps unchanged).
• CI green on this PR.
• After merge: tag v0.2.2 on the merge commit, push, watch release.yml publish the three platform binaries.
• Downstream cli-released dispatch fires to docs + landing, opening auto-bump PRs.