Revert snpeff to >=4.3.1t to fix ARM64 solver conflict

The snpeff=5.2 pin (and its openjdk>=11 dep) creates an unsolvable icu
version conflict on ARM64 with fgbio's r-base, vphaser2's boost-cpp,
and csvkit's pyicu. Reverting to unblock builds while we investigate
alternative approaches to address snpeff's Log4Shell CVE.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: dpark01

docker/requirements/phylo.txt

@@ -4,5 +4,5 @@ lofreq>=2.1.5
 mafft>=7.508
 mummer4>=4.0.0rc1
 muscle=3.8.1551
-snpeff=5.2
+snpeff>=4.3.1t
 vphaser2>=2.0

src/viral_ngs/phylo/snpeff.py

@@ -23,7 +23,7 @@
 _log = logging.getLogger(__name__)
 
 TOOL_NAME = 'snpEff'
-TOOL_VERSION = '5.2'
+TOOL_VERSION = '4.3.1t'
 
 
 class SnpEff(core.Tool):