hotfix(dc/tool-c): Fix compute formula validation and binning NaN serialization

Critical fixes:
1. Compute column: Add Chinese comma support in formula validation
   - Problem: Formula with Chinese comma failed validation
   - Fix: Add Chinese comma character to allowed_chars regex
   - Example: Support formulas like 'col1（kg）+ col2，col3'

2. Binning operation: Fix NaN serialization error
   - Problem: 'Out of range float values are not JSON compliant: nan'
   - Fix: Enhanced NaN/inf handling in binning endpoint
   - Added np.inf/-np.inf replacement before JSON serialization
   - Added manual JSON serialization with NaN->null conversion

3. Enhanced all operation endpoints for consistency
   - Updated conditional, dropna endpoints with same NaN/inf handling
   - Ensures all operations return JSON-compliant data

Modified files:
- extraction_service/operations/compute.py: Add Chinese comma to regex
- extraction_service/main.py: Enhanced NaN handling in binning/conditional/dropna

Status: Hotfix complete, ready for testing

python-microservice/operations/__init__.py

@@ -15,3 +15,4 @@
 __version__ = '1.0.0'
 
 
+

python-microservice/operations/binning.py

@@ -122,3 +122,4 @@ def apply_binning(
     return result
 
 
+

python-microservice/operations/filter.py

@@ -108,3 +108,4 @@ def apply_filter(
     return result
 
 
+

python-microservice/operations/recode.py

@@ -78,3 +78,4 @@ def apply_recode(
     return result
 
 
+