Update Functionality Levels for Patch Releases

Add FLEVEL table entries for the 1.5.2, 1.4.4, 1.4.3, and
1.0.9 releases, including their library version data and
critical bug fix notes.

Author: val-ms

src/appendix/FunctionalityLevels.md

@@ -9,8 +9,12 @@ Setting appropriate FLEVELs in signatures is particularly crucial when using fea
 | Release Date | Release  | FLEVEL | clamav lib | .so    | freshclam lib | .so   | API/ABI changes, major features, other notes                                                                                                                                              |
 | ------------ | -------- | ------ | ---------- | ------ | ------------- | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | n/a          | 1.6.0    | 240    | n/a        | n/a    | n/a           | n/a   | tbd                                                                                                                                                                                       |
+| Mar-2026     | 1.5.2    | 232    | 13:00:01   | 12.1.0 | 4:00:00       | 4.0.0 | Critical bug fixes                                                                                                                                                                        |
+| Mar-2026     | 1.4.4    | 214    | 12:03:00   | 12.0.3 | 3:02:00       | 3.0.2 | Critical bug fixes                                                                                                                                                                        |
 | Oct-2025     | 1.5.1    | 231    | 13:00:01   | 12.1.0 | 4:00:00       | 4.0.0 | Critical bug fixes                                                                                                                                                                        |
 | Oct-2025     | 1.5.0    | 230    | 13:00:01   | 12.1.0 | 4:00:00       | 4.0.0 | New scan callbacks, `cl_scan*_ex()` APIs, `.cvd.sign` files, FIPS-limits, `CL_TYPE_AI_MODEL`, PDF & HTML URI's in metadata JSON, detect encrypted OLE2                                    |
+| Jun-2025     | 1.4.3    | 213    | 12:03:00   | 12.0.3 | 3:02:00       | 3.0.2 | Critical bug fixes                                                                                                                                                                        |
+| Jun-2025     | 1.0.9    | 169    | 11:00:00   | 11.0.0 | 2:02:00       | 2.0.2 | Critical bug fixes                                                                                                                                                                        |
 | Jan-2025     | 1.4.2    | 212    | 12:03:00   | 12.0.3 | 3:02:00       | 3.0.2 | Critical bug fixes                                                                                                                                                                        |
 | Jan-2025     | 1.0.8    | 168    | 11:00:00   | 11.0.0 | 2:02:00       | 2.0.2 | Critical bug fixes                                                                                                                                                                        |
 | Sep-2024     | 1.4.1    | 211    | 12:03:00   | 12.0.3 | 3:02:00       | 3.0.2 | Critical bug fixes                                                                                                                                                                        |