Add SER fallback + finite-sample/EB knobs to GWAS SuSiE-RSS fine-mapping#552
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fineMappingPipeline (GwasSumStats) gains serFallback, rFinite, rMismatch (+rMismatchMethod, checkPrior, keepFullFit). With serFallback=TRUE it fits SuSiE-RSS with finite-sample R + EB LD-mismatch and, when susieR flags the multi-effect fit unreliable (R_reliability_flag), reports the single-effect ser_model instead -- retaining the multi-effect fit and recording the flag on getSusieFit()$multiEffectFit/$R_reliability_flag/$serFallbackUsed. rFinite defaults to the LD-panel sample size. Gated so serFallback=FALSE (default) and all QTL paths are byte-identical. Reproduces the single-panel notebook's R_finite/eb + SER-fallback behavior.
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fineMappingPipeline (GwasSumStats) gains
serFallback,rFinite,rMismatch(+rMismatchMethod,checkPrior,keepFullFit). WithserFallback=TRUEit fits SuSiE-RSS with finite-sample R + EB LD-mismatch and, when susieR flags the multi-effect fit unreliable (R_reliability_flag), reports the single-effectser_modelinstead — retaining the multi-effect fit (keepFullFit, default fallback-only) and recording the decision ongetSusieFit().rFiniteauto-defaults to the LD-panel sample size. Gated soserFallback=FALSE(default) and all QTL paths are byte-identical.Tests: 448/0 fineMappingPipeline (fire path, default-off, forwarding, retention, QTL-unaffected), wrappers/sumstatsQc/ld green. Validated on chr21 AD_Bellenguez (default lead chr21:26135742:T:C matches baseline) + chr22 MWE.