v1.14.0 release blockers #1209

What has to land on develop before #1194 merges, one PR per item. Decisions are in the #1194 thread.

• BUG: use the angular rates in the solid propulsion equations of motion #1195: solid-propulsion angular rates
• Reverts: MNT: store ref_factor on rocket aero surface components (#561) #1129 (plus a reference-area factor computed on demand), ENH: list NOAA atmosphere datasets and fetch latest (#660) #1136, ENH: add Flight post-step callback across all phases (#758) #1128, and delete the other unreleased public symbols that nothing uses
• Flight: the 4 tip-off bugs in ENH: Implement 3-DOF Single Rail Button Flight Phase (Tip-off Analysis) #920, a validation test against an independent ODE, rail-exit root finding, a time trigger before rail exit
• Monte Carlo: plots crash, initial_solution, CustomSampler seed, object seed warning, simulate_convergence seed, grains_bonded, resuming with holes, one integer seed per row, v1.13 append warns
• Sensors: the accelerometer evaluates gravity at u[3] (x velocity) instead of the altitude u[2]
• Exceptions: stochastic AssertionError raises move to rocketpy.exceptions (still subclass AssertionError)
• Environment: ENH: cache downloaded atmosphere netCDF datasets (#654) #1137 cache fixes, Open-Meteo ensemble pressure levels, ENH: Create ensembles from user-defined profiles #1141
• Aerodynamics: ENH: Add tube-fin aerodynamic surface #1144 tube fins validated against NACA TN 4117, roll damping, no stall clip
• Motors: ENH: model unbonded solid-motor grain CM shift (#340) #1138 (stochastic and docs), Fix spurious ValueError from floating-point roundoff at exact tank depletion #1166 (tolerance in Function.compose), static_margin setter
• Tests: ENH: continue a Monte Carlo study from the root its rows were drawn with #1187 tests marked slow, importorskip, the 2 tests that cannot fail, Defiance renamed as a regression test, TST: run the EnvironmentAnalysis tests in the default suite #1176
• Docs and CHANGELOG: stochastic.rst, the 13 missing PRs, a Breaking changes section