fix(mssql): modernize adapter config

[cofin]

Summary

Modernizes the mssql-python adapter around the current connection keyword surface and BulkCopy runtime behavior.

Details

• Expands typed connection params for current ODBC-style aliases, including address, database, username, trust/encryption, certificate, SPN, multi-subnet, retry, keepalive, IP preference, packet size, and timeout options.
• Normalizes supported aliases into canonical connection-string keywords and rejects conflicting aliases instead of silently choosing one.
• Filters settings that mssql-python does not consume from SQLSpec's generated connection string, including driver/app/workstation/MARS-style keys.
• Updates bulk_copy() defaults to match the mssql-python runtime and returns a typed MssqlPythonBulkCopyResult when the driver provides one.
• Exports MssqlPythonBulkCopyResult and adds focused unit coverage for config normalization, alias conflicts, BulkCopy defaults, and BulkCopy result handling.

Review Notes

This branch is rebased onto the latest main; the larger surface area comes from keeping mssql-python config aliases and BulkCopy behavior aligned with the driver runtime.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 96.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.40%. Comparing base (6b216bc) to head (f44ada8).

Files with missing lines	Patch %	Lines
sqlspec/adapters/mssql_python/driver.py	88.88%	1 Missing and 1 partial ⚠️
sqlspec/adapters/mssql_python/core.py	96.15%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #512      +/-   ##
==========================================
+ Coverage   71.56%   74.40%   +2.83%     
==========================================
  Files         439      439              
  Lines       53386    53427      +41     
  Branches     8456     8460       +4     
==========================================
+ Hits        38205    39751    +1546     
+ Misses      12665    11052    -1613     
- Partials     2516     2624     +108     

Flag	Coverage Δ
integration	58.27% <0.00%> (+3.65%)	⬆️
py3.10	71.19% <96.00%> (+9.71%)	⬆️
py3.11	71.21% <96.00%> (+0.01%)	⬆️
py3.12	71.21% <96.00%> (+9.72%)	⬆️
py3.13	71.21% <96.00%> (+9.72%)	⬆️
py3.14	73.53% <92.68%> (+12.81%)	⬆️
unit	61.72% <96.00%> (+0.02%)	⬆️

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Files with missing lines	Coverage Δ
sqlspec/adapters/mssql_python/__init__.py	100.00% <ø> (ø)
sqlspec/adapters/mssql_python/config.py	81.46% <100.00%> (+2.23%)	⬆️
sqlspec/adapters/mssql_python/core.py	79.66% <96.15%> (+4.88%)	⬆️
sqlspec/adapters/mssql_python/driver.py	62.61% <88.88%> (-0.30%)	⬇️

... and 37 files with indirect coverage changes

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