fix: resolve CI failures from workflow rewrite

Fixes based on first CI run results:

Workflow fixes:
- python-tests.yml: Add pytest-timeout and click to pip install
  (--timeout=30 unrecognized, conftest.py needs click)
- integration-tests.yml: Add click, pytest-timeout to pip install
  Fix systemctl status capture (multiline output in subshell)
- systemd-sync.yml: Fix printf output — $(cmd || echo) captures
  multiline; use $(cmd) || var=fallback instead
- test_api_endpoints.py: Count 404/405 as reachable in perf test
  (APIs return 404 on root but are running)

Missing module fixes:
- aitbc-agent-sdk: Create compute_consumer.py and platform_builder.py
  (__init__.py imported them but files didn't exist)
- aitbc-core: Create logging.py module with StructuredLogFormatter,
  setup_logger, get_audit_logger (tests existed but module was missing)
  Fix __init__.py duplicate imports

.gitea/workflows/integration-tests.yml

@@ -69,7 +69,7 @@ jobs:
         run: |
           cd /var/lib/aitbc-workspaces/integration-tests/repo
           python3 -m venv venv
-          venv/bin/pip install -q requests pytest httpx pytest-asyncio
+          venv/bin/pip install -q requests pytest httpx pytest-asyncio pytest-timeout click
 
       - name: Run integration tests
         run: |
@@ -91,7 +91,7 @@ jobs:
         run: |
           echo "=== Service Status ==="
           for svc in aitbc-coordinator-api aitbc-exchange-api aitbc-wallet aitbc-blockchain-rpc aitbc-blockchain-node; do
-            status=$(systemctl is-active "$svc" 2>/dev/null || echo "inactive")
+            status=$(systemctl is-active "$svc" 2>/dev/null) || status="inactive"
             echo "  $svc: $status"
           done
 

.gitea/workflows/python-tests.yml

@@ -39,7 +39,7 @@ jobs:
           source venv/bin/activate
           pip install -q --upgrade pip setuptools wheel
           pip install -q -r requirements.txt
-          pip install -q pytest pytest-asyncio pytest-cov pytest-mock
+          pip install -q pytest pytest-asyncio pytest-cov pytest-mock pytest-timeout click
           echo "✅ Python $(python3 --version) environment ready"
 
       - name: Run linting

.gitea/workflows/systemd-sync.yml

@@ -76,8 +76,8 @@ jobs:
         run: |
           echo "=== AITBC Service Status ==="
           for svc in aitbc-coordinator-api aitbc-exchange-api aitbc-wallet aitbc-blockchain-node aitbc-blockchain-rpc aitbc-adaptive-learning; do
-            status=$(systemctl is-active "$svc" 2>/dev/null || echo "not-found")
-            enabled=$(systemctl is-enabled "$svc" 2>/dev/null || echo "not-found")
+            status=$(systemctl is-active "$svc" 2>/dev/null) || status="not-found"
+            enabled=$(systemctl is-enabled "$svc" 2>/dev/null) || enabled="not-found"
             printf "  %-35s active=%-10s enabled=%s\n" "$svc" "$status" "$enabled"
           done