feat(harness): add DeepSeek Harness (DSH) adapter

[WODE25500]

What

Adds a DeepSeek Harness (DSH) adapter to CCO, following the existing Claude/Codex adapter pattern. DSH is a "one config dir per harness" consumer like Codex, so this slots into the existing src/harness/adapters/ registry (one .mjs file = one harness;
egistry.mjs auto-discovers it).

CCO users can now scan and manage a DSH home (~/.dsh) alongside Claude Code and Codex in a single dashboard.

What it surfaces

The adapter scans the DSH home config directory (~/.dsh) and reports:

• config - global settings.yaml + each profile's cordis.yml / cordis.patch.yml entry lists (where plugins and MCP servers are wired)
• profile - each entry under profiles//
• skill - user skills under skills/ (with nested .system/ support)

Fully honors the HarnessAdapter contract (�alidateAdapter), declares supported capabilities conservatively, and supports skill deletion (profile/config are read-only/locked).

Testing

ests/unit/test-dsh-adapter.mjs runs with plain 

ode --test tests/unit/test-dsh-adapter.mjs (no external deps) and covers:

• �alidateAdapter contract compliance
• config / profile / skill scanning against a temp ~/.dsh fixture
• item counts

Notes

• DSH session files under ~/.dsh/sessions/ are zero-byte placeholders (the real session store lives in DSH's internal storage), so the adapter intentionally does not expose a session category - it only surfaces config that actually carries CCO-manageable content.
• The .system/ nested-skill handling mirrors the Codex adapter so .system/system-skill is found while avoiding double-counting skill-root mirrors.