Stokes_Constrained: in-saddle multiplier free-slip + topography (supersedes #219)#224

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lmoresi merged 7 commits into

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feature/stokes-constrained

Jun 8, 2026

Commits on Jun 8, 2026

Add SNES_Stokes_Constrained: non-penalty free-slip + recoverable topography
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docs: record P'=[p,h] monolithic fieldsplit feasibility spike
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Address Copilot review on #219: guards for label, non-convergence, MPI
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Add SNES_Stokes_BlockConstrained: in-saddle multiplier for free-slip + topography
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Lossless boundary-only multiplier reduction (default on)
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Promote in-saddle solver to Stokes_Constrained; remove outer-loop variant
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Address Copilot review on #224
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