fix: remove unused fileDB params from config schema, defaults, and docs

[dcoric]

Summary

Removes the unused params configuration property from the fileDB (fs type) database sink configuration, as identified in #1288.

The params.filepath property was defined in the configuration schema and default config but was never actually read by the fileDB implementation. The database files are created at hardcoded paths (./.data and ./.data/db) regardless of what was configured.

Changes

• Removed params property from the File-based DB Config schema in config.schema.json
• Removed params block from default config in proxy.config.json
• Updated test configuration files to remove unused params
• Regenerated TypeScript config types
• Updated test cases that referenced the params property

Test plan

• All existing tests pass (539 tests)
• Generated TypeScript types no longer include params field
• Config validation still works correctly for fs type sinks

Closes #1288

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.40%. Comparing base (09b226b) to head (25ff65a).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1360   +/-   ##
=======================================
  Coverage   80.40%   80.40%           
=======================================
  Files          65       65           
  Lines        4608     4608           
  Branches      775      775           
=======================================
  Hits         3705     3705           
  Misses        888      888           
  Partials       15       15           

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[kriswest]

LGTM