fix: make CLI robust to missing coordinator dependencies

- Replace hardcoded absolute paths with project-relative resolution
- Add AITBC_SERVICES_PATH environment variable override
- Wrap service imports in try/except with graceful degradation
- Add aiohttp to CLI requirements
- Create missing README.md for aitbc-agent-sdk to fix poetry build
- Make run_all_tests.sh portable with PROJECT_ROOT calculation
- Fix enterprise_integration.py path handling

CLI now loads successfully even when coordinator-api services
are not installed. Advanced commands fail with helpful hints
instead of crashing the entire CLI.

packages/py/aitbc-agent-sdk/README.md

@@ -0,0 +1,18 @@
+# aitbc-agent-sdk
+
+Agent SDK for AITBC (AI Agent Compute Network).
+
+This package provides tools and abstractions for building AI agents that participate in the AITBC decentralized compute marketplace.
+
+## Installation
+
+```bash
+pip install -e .[dev]
+```
+
+## Development
+
+Run tests:
+```bash
+pytest
+```