chore(deps): bump @swapkit/* + enrich dep changelogs at release time

[towanTG]

What

1. Bumps the @swapkit/* SDK deps to latest (the version bump missed in the last merge): toolboxes 4.17.2→4.17.5, helpers 4.14.0→4.14.1, core 4.4.34→4.4.37, plugins 4.6.48→4.6.51, server 4.3.2→4.3.5, utxo-signer 2.2.1→2.2.2, wallet-core 4.3.5→4.3.6, wallet-keystore 4.4.2→4.4.5 (root + workspace, sherif clean).

2. Moves dep-changelog enrichment from bump time to release time — mirroring the SDK's changeset:enrich.

The new flow

bump PR (this one): deps bumped + a SIMPLE changeset of `old → new` markers
release on develop:
  changeset version       → consolidates the marker changeset into CHANGELOG.md (Version Packages PR)
  enrich-dep-changelogs   → replaces the markers with the REAL underlying changes,
                            sliced from each bumped dep's changelog in bun's .bun store, deduped
  bun install
→ the Version Packages release PR shows the enriched notes

• generate-dep-changeset.ts is now changelog-free — it just records @swapkit/x: A → B markers. Deterministic, no node_modules dependency, so the enforce-dep-changeset check stays reliable.
• tools/enrich-dep-changelogs.ts (new) does the enrichment at release time, reusing the shared tools/changelog.ts helpers. It reads the bumped deps' changelogs from bun's isolated store (handling the hoisting issue where a different version is symlinked at top level) and keeps the SDK's own (via @swapkit/x@y) attribution.
• version-bump → changeset version && enrich-dep-changelogs && bun install.

Verified locally

• generate:dep-changeset → the simple marker changeset (enforce check will pass — deterministic).
• Simulated a changeset version render and ran the enricher → markers correctly replaced with the deduped underlying changes (TON #272, Sui #269/#271, changelog #274) carrying the SDK's (via toolboxes@…) attribution.
• bun install clean (sherif passes), biome clean.

Note: changeset version itself can't run locally (the changelog-github plugin needs the GitHub API + token) — that path runs in CI. The enricher was validated against a faithful fixture of its output.