fix: Add shebangs to Python scripts in resources/scripts/

Added #!/usr/bin/env python3 shebang to Python scripts that were missing it:
- dspy_setup_validator.py
- lm_config_manager.py
- module_inspector.py
- prediction_parser.py
- signature_codegen.py
- trajectory_logger.py
- tool_registry.py
- model_manager.py
- optimizer_wrapper.py
- cache_manager.py
- metrics_collector.py
- vector_db_manager.py
- And others

This fixes the Level 3 Resources validation that checks for proper shebangs
in all executable Python scripts.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: rand

skills/rust/pyo3-dspy-agents/resources/scripts/tool_registry.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Tool Registry Manager for DSPy ReAct Agents
 

skills/rust/pyo3-dspy-agents/resources/scripts/trajectory_logger.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Trajectory Logger for DSPy ReAct Agents
 

skills/rust/pyo3-dspy-fundamentals/resources/scripts/dspy_setup_validator.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 DSPy + PyO3 Setup Validator
 

skills/rust/pyo3-dspy-fundamentals/resources/scripts/lm_config_manager.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Language Model Configuration Manager
 

skills/rust/pyo3-dspy-fundamentals/resources/scripts/module_inspector.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 DSPy Module Inspector
 

skills/rust/pyo3-dspy-optimization/resources/scripts/model_manager.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Model Manager for DSPy Compiled Models
 

skills/rust/pyo3-dspy-optimization/resources/scripts/optimizer_wrapper.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 DSPy Optimizer Wrapper
 

skills/rust/pyo3-dspy-production/resources/scripts/cache_manager.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Cache Manager for DSPy Predictions
 

skills/rust/pyo3-dspy-production/resources/scripts/metrics_collector.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Prometheus Metrics Collector for DSPy Services
 

skills/rust/pyo3-dspy-rag-pipelines/resources/scripts/vector_db_manager.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Vector Database Manager