chore: add diagnostic logging around workspace git clone

The workspace creation endpoint returns 500 but the actual error is not
visible. Add explicit error logging when GitService.clone fails and info
logging when git creates a directory name different from the one derived
from the remote URL.

Quality gates:
- pytest tests/unit: 219 passed
- mypy: clean on changed files

.pi-map.md

@@ -18,7 +18,7 @@ index: ./.pi-map.index.md
 Trust boundary: index routes, map orients, source decides.
 
 ## role
-Infrastructure and deployment configuration package for a self-hosted project management platform with containerized services, SSO integration, and reverse proxy support.
+Infrastructure and deployment configuration for a self-hosted project management platform with containerized services, reverse proxy setup, and AI agent development workflows.
 ## files
 - .env.example | Provides a template of environment variables for configuring a Headquarter application with PostgreSQL, Redis, Authentik SSO, and Docker/Traefik deployment
 - .gitignore | Specifies files and directories for Git to ignore across a multi-language project with Python, Node, and custom tooling | dep: Git
@@ -31,7 +31,7 @@ Infrastructure and deployment configuration package for a self-hosted project ma
 - progress.md | Tracks completed and remaining tasks for a backend-frontend code refactoring project organized in 7 phases
 - swap-pane | Empty file with no functionality
 ## arch
-Docker Compose-based microservices architecture with PostgreSQL/Redis data layer, separate API/frontend containers, Traefik edge routing, and environment-driven configuration management.
+Docker Compose-based microservices with PostgreSQL/Redis backing, Traefik edge routing, OAuth2 SSO integration, and OpenSpec-driven AI agent orchestration layered over a Python/Node full-stack application.
 ## tags
 docker, redis, git, application, postgresql, compose, traefik, project
 ## symbols