Experiment with GPU Cauchy-field deformation

[isomorphisms]

Experimental branch for the GPU Cauchy-source redesign, now brought forward onto current main (Holomorphic production naming and canonical smooth-orbit behavior).

• removes the CPU polynomial walk, worker threads, sample-point search, accepted-step state, and coefficient budget
• supplies elapsed time to the fragment shader
• evaluates 24 exterior Cauchy sources per fragment
• reuses the smooth orbital geometry promoted on main for those source trajectories
• keeps deterministic complex source weights fixed in time so visible evolution comes from source motion rather than rotating residues
• keeps all Cauchy singularities outside the circumscribed visible region, including the 8% elliptic distortion bound
• preserves rational zero/pole interaction and canonical Wegert coloring
• retains the experimental pinch-zoom range 0.1–32.0
• builds a sideloadable APK and runs it in the Android emulator
• uploads the APK, runtime log, and before/after motion screenshots so this branch can be judged from actual execution rather than CI status alone

Mathematical caveat: this is deliberately a visible-region holomorphic/nonzero construction, not a whole-plane entire construction. The off-screen Cauchy sources are genuine poles of q_t; exp(q_t) has essential singularities there. Zoom is also not mathematically passive because the exterior source orbits are defined relative to the current viewport radius.

Draft until the rebuilt APK/runtime evidence has been inspected for motion and zoom behavior.