Merge pull request #19396 from michaelnebel/csharp/equality-on-floats

C#: Add `cs/equality-on-floats` to the Code Quality suite.

Author: michaelnebel

csharp/ql/integration-tests/posix/query-suite/csharp-code-quality.qls.expected

@@ -5,6 +5,7 @@ ql/csharp/ql/src/Dead Code/DeadStoreOfLocal.ql
 ql/csharp/ql/src/Likely Bugs/Collections/ContainerLengthCmpOffByOne.ql
 ql/csharp/ql/src/Likely Bugs/Collections/ContainerSizeCmpZero.ql
 ql/csharp/ql/src/Likely Bugs/DangerousNonShortCircuitLogic.ql
+ql/csharp/ql/src/Likely Bugs/EqualityCheckOnFloats.ql
 ql/csharp/ql/src/Likely Bugs/ReferenceEqualsOnValueTypes.ql
 ql/csharp/ql/src/Likely Bugs/SelfAssignment.ql
 ql/csharp/ql/src/Likely Bugs/UncheckedCastInEquals.ql

csharp/ql/src/Likely Bugs/EqualityCheckOnFloats.ql

@@ -5,7 +5,7 @@
  *              computation does not follow the standard rules of algebra.
  * @kind problem
  * @problem.severity warning
- * @precision medium
+ * @precision high
  * @id cs/equality-on-floats
  * @tags reliability
  *       correctness

csharp/ql/src/change-notes/2025-04-28-equality-on-floats-precision.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Changed the precision of the `cs/equality-on-floats` query from medium to high.

csharp/ql/src/codeql-suites/csharp-code-quality.qls

@@ -14,3 +14,4 @@
       - cs/non-short-circuit
       - cs/useless-assignment-to-local
       - cs/invalid-string-formatting
+      - cs/equality-on-floats