fix(health): Fix undefined stage variables in workflow template

- Replace undefined 'stage' variable with hard-coded stage names
- Fixes F821 lint errors in new_sample_workflow1.py
- Improves code quality by eliminating undefined name references

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: silversurfer562

src/empathy_os/workflows/new_sample_workflow1.py

@@ -80,7 +80,7 @@ async def _analyze(
 
         """
         # TODO: Implement analyze logic
-        prompt = f"{stage} stage: {input_data}"
+        prompt = f"analyze stage: {input_data}"
 
         if self.executor:
             result = await self.executor.execute(
@@ -107,7 +107,7 @@ async def _process(
 
         """
         # TODO: Implement process logic
-        prompt = f"{stage} stage: {input_data}"
+        prompt = f"process stage: {input_data}"
 
         if self.executor:
             result = await self.executor.execute(
@@ -134,7 +134,7 @@ async def _report(
 
         """
         # TODO: Implement report logic
-        prompt = f"{stage} stage: {input_data}"
+        prompt = f"report stage: {input_data}"
 
         if self.executor:
             result = await self.executor.execute(