Add project-aware chat startup defaults

Make repo-root chat startup native by letting MCP servers carry a default project source for workspace creation. When a chat host starts from a Git checkout, workspace_create can now omit seed_path and inherit the server startup source; explicit --project-path and clean-clone --repo-url/--repo-ref paths are supported as fallbacks.

Add project startup resolution and materialization, surface origin_kind/origin_ref in workspace_seed, update chat-host docs and the repro/fix smoke to use project-aware workspace creation, and switch dist-check to uv run pyro so verification stays stable after uv reinstalls.

Validated with uv lock, focused startup/server/CLI pytest coverage, UV_CACHE_DIR=.uv-cache make check, UV_CACHE_DIR=.uv-cache make dist-check, and real guest-backed smokes for both explicit project_path and bare repo-root auto-detection.

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 All notable user-visible changes to `pyro-mcp` are documented here.
 
+## 4.1.0
+
+- Added project-aware MCP startup so bare `pyro mcp serve` from a repo root can
+  auto-detect the current Git checkout and let `workspace_create` omit
+  `seed_path` safely.
+- Added explicit fallback startup flags for chat hosts that do not preserve the
+  server working directory: `--project-path`, `--repo-url`, `--repo-ref`, and
+  `--no-project-source`.
+- Extended workspace seed metadata with startup origin fields so chat-facing
+  workspace creation can show whether a workspace came from a manual seed path,
+  the current project, or a clean cloned repo source.
+
 ## 4.0.0
 
 - Flipped the default MCP/server profile from `workspace-full` to