fix: resolve Poetry command not found errors in package tests

POETRY PATH FIX: Ensure Poetry is available in all package test steps

Issues Fixed:
❌ poetry: command not found in Install Dependencies step
❌ PATH not preserved between workflow steps
❌ Poetry installation not available in subsequent steps

Solution Applied:
✅ Added Poetry PATH export to all steps using Poetry
✅ Added Poetry verification in Install Dependencies step
✅ Fallback Poetry installation if not found
✅ Consistent PATH management across all steps

This resolves the critical Poetry availability issue that was
preventing package tests from running in the CI/CD environment.

.gitea/workflows/package-tests.yml

@@ -121,6 +121,19 @@ jobs:
           echo "=== INSTALLING DEPENDENCIES ==="
           cd /opt/aitbc/python-packages-workspace/repo/${{ matrix.package.path }}
           
+          # Ensure Poetry is available and PATH is set
+          export PATH="$HOME/.local/bin:$PATH"
+          
+          # Verify Poetry installation
+          if ! command -v poetry >/dev/null 2>&1; then
+            echo "❌ Poetry not found, installing..."
+            curl -sSL https://install.python-poetry.org | python3 -
+            export PATH="$HOME/.local/bin:$PATH"
+          fi
+          
+          # Verify Poetry is working
+          poetry --version
+          
           # Install dependencies with Poetry
           poetry install --with dev
           
@@ -133,6 +146,9 @@ jobs:
           echo "=== RUNNING LINTING ==="
           cd /opt/aitbc/python-packages-workspace/repo/${{ matrix.package.path }}
           
+          # Ensure Poetry is available
+          export PATH="$HOME/.local/bin:$PATH"
+          
           # Run mypy type checking
           echo "Running mypy..."
           poetry run mypy src/ || echo "MyPy completed with warnings"
@@ -152,6 +168,9 @@ jobs:
           echo "=== RUNNING PYTHON PACKAGE TESTS ==="
           cd /opt/aitbc/python-packages-workspace/repo/${{ matrix.package.path }}
           
+          # Ensure Poetry is available
+          export PATH="$HOME/.local/bin:$PATH"
+          
           # Run tests with pytest
           poetry run pytest -v --tb=short --cov=src --cov-report=xml --cov-report=term || echo "Tests completed with failures"
           
@@ -162,6 +181,9 @@ jobs:
           echo "=== BUILDING PYTHON PACKAGE ==="
           cd /opt/aitbc/python-packages-workspace/repo/${{ matrix.package.path }}
           
+          # Ensure Poetry is available
+          export PATH="$HOME/.local/bin:$PATH"
+          
           # Build package with Poetry
           poetry build
           
@@ -175,6 +197,9 @@ jobs:
           echo "=== VALIDATING PYTHON PACKAGE ==="
           cd /opt/aitbc/python-packages-workspace/repo/${{ matrix.package.path }}
           
+          # Ensure Poetry is available
+          export PATH="$HOME/.local/bin:$PATH"
+          
           # Check package metadata
           poetry version
           poetry show --tree