docs: remove resolved issues from KNOWN-ISSUES.md

Keep only open issues. Resolved issues don't need to be tracked here.

Author: dluc

KNOWN-ISSUES.md

@@ -25,67 +25,10 @@ km search 'content:"user:password"'
 
 ---
 
-## Resolved Issues
+## Notes
 
-### NOT Operator Issues (Resolved)
+### Query Syntax
 
-**Status:** Fixed
-
-**Issue:** The NOT operator had two problems:
-1. **Standalone NOT crashed:** `km search "NOT foo"` threw FTS5 syntax error
-2. **NOT didn't exclude:** `km search "foo AND NOT bar"` returned documents containing both instead of excluding "bar"
-
-**Resolution:**
-- Implemented `FtsQueryResult` record to separate FTS query string from NOT terms
-- Modified `FtsQueryExtractor` to collect NOT terms separately instead of passing them to FTS5
-- Added LINQ post-filtering in `NodeSearchService.SearchAsync()` to exclude NOT terms
-- Added `GetAllDocumentsAsync()` in `SqliteFtsIndex` to handle standalone NOT queries
-- Case-insensitive filtering checks title, description, and content fields
-- E2E tests added in `SearchEndToEndTests.cs` (tests: `KnownIssue1_*`)
-
-**Important Note:** The infix query parser requires explicit AND between terms. Use:
+The infix query parser requires explicit AND between terms:
 - `foo AND NOT bar` (correct) instead of `foo NOT bar` (incorrect - ignores NOT)
 - `(foo OR baz) AND NOT bar` (correct) instead of `(foo OR baz) NOT bar` (incorrect)
-
-**Files Changed:**
-- `src/Core/Search/NodeSearchService.cs` - Added `FtsQueryResult`, `NotTerm` records and LINQ filtering
-- `src/Core/Search/SqliteFtsIndex.cs` - Added `GetAllDocumentsAsync()` for standalone NOT support
-
----
-
-### Quoted Phrases Don't Escape Operators (Resolved)
-
-**Status:** Fixed
-
-**Issue:** Cannot search for literal phrases containing reserved words like "AND", "OR", "NOT".
-
-**Example:**
-```bash
-km put "Meeting with Alice AND Bob"
-km search '"Alice AND Bob"'
-# Now works correctly and finds the document
-```
-
-**Resolution:**
-- The tokenizer correctly handles quoted strings and preserves them as literal text
-- The FTS query extractor properly quotes phrases containing reserved words
-- E2E tests added in `SearchEndToEndTests.cs` to prevent regression (tests: `KnownIssue2_*`)
-
----
-
-## Testing Gaps
-
-These bugs were discovered through comprehensive E2E testing. Previous tests only verified:
-- AST structure correctness
-- LINQ expression building
-- Direct FTS calls
-
-But did NOT test:
-- Full pipeline: Parse -> Extract FTS -> Search -> Filter -> Rank
-- Default settings (MinRelevance=0.3)
-- Actual result verification
-
-**Lesson:** Exit code testing and structure testing are insufficient. Must test actual behavior with real data.
-
----
-