fix(ks_search_tool): resolve multiple bugs in ks_search_tool.py (Fixes #73)

[zohaib-7035]

Summary

This PR fixes the multiple issues identified in Issue #73 regarding ks_search_tool.py.

Changes Made:

• Dead stub classes: Removed unused BaseModel and Field leftovers from removing Pydantic.
• Standardized result schema: Both general_search and _perform_search now return consistent _id, title, description fields.
• Silent empty return: global_fuzzy_keyword_search now logs a warning when datasources_config.json is missing.
• All fuzzy matches used: search_across_all_fields now iterates over all matches instead of only matches[0].
• Deprecated API: Replaced asyncio.get_event_loop() with asyncio.get_running_loop().
• print() → logging: Replaced all 10+ print calls with logger.info() / logger.error().
• Updated test_run.py for renamed field (title_guess → title).

Verification

py_compile: backend/ks_search_tool.py ✓
py_compile: backend/test_run.py ✓
No errors or regressions.

Fixes #73

[QuantumByte-01]

All fixes from #73 are correctly addressed:

• Dead BaseModel/Field stubs removed ✅
• asyncio.get_event_loop() → asyncio.get_running_loop() ✅
• All fuzzy matches iterated (not just matches[0]) ✅
• Warning logged when datasources_config.json is missing ✅
• print() → logging throughout ✅
• Schema unified (title_guess→title, content→description) ✅

One issue before merge: please remove backend/test_run.py. It's a dev script that makes live network calls — it doesn't belong committed to the repo.

Also note: this PR and PR #97 both modify ks_search_tool.py from the same base — they will conflict. This one should be merged first (after PR #97 is fixed).

[zohaib-7035]

Hi @QuantumByte-01 ,
Done! Removed backend/test_run.py as requested it was a dev script making live network calls and shouldn't be in the repo.

The PR should now be ready to merge. Let me know if anything else needs to be addressed!

[QuantumByte-01]

Both PR #97 and #98 have merge conflicts with main (introduced after #92 was merged). Please rebase both branches on the latest main:

git fetch origin main
git rebase origin/main
git push --force-with-lease

Once rebased, these will be mergeable.