Every case carried its own copies of shared STL, TCD, JFH, and flight
plan files. One canonical copy of each is kept under data/stl, data/tcd,
data/jfh, and data/flight_plan; all byte-identical copies are deleted
(verified by content hash before removal).

Files whose shared name was already taken by different content, or that
existed under several case-specific names, were given descriptive
canonical names instead:

- tcf_16_thrusters.txt, tcf_4_thrusters.txt, tcf_1_thruster.txt,
  tcf_24_thrusters.txt (previously tcf_<case_name>.txt / tcf.txt)
- cylinder_low_res.stl (raw source of cylinder_transformed.stl;
  data/stl/cylinder.stl is a different high-res mesh)
- mold_funnel_high_res.stl / mold_funnel_high_res_transformed.stl
  (2880-tri funnel; the 208-tri variant keeps the plain name)
- square_plate_large_fine.stl (was also square_plate_large.stl)

Also removes orphaned duplicates: tests/JFH05.A (identical to
data/jfh/JFH05.A, referenced nowhere) and data/tcd/TCD2.txt (identical
to tcf_flight_envelopes.txt).

Files with the same name but genuinely different content stay
case-local; the local-first resolver guarantees they win over data/.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

config.ini tcf/jfh/stl_thruster keys now reference the canonical names
in data/ (tcf_16_thrusters.txt, tcf_1_thruster.txt, jfh_base_case.A,
mold_funnel_high_res_transformed.stl, ...). Transform scripts read
their base STL from data/stl via the repo root; transformed outputs are
still written case-locally, where the local-first resolver picks them
up. Updates a stale comment pointing at the removed data/tcd/TCD2.txt.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tdf.csv and ccf.txt hold thruster performance data and cluster
placement for a specific case run and are expected to be tuned per
case, so they are excluded from the shared data/ consolidation.
Restores every case-local tdf.csv, ccf.txt, and tdf_legend.csv exactly
as on master, restores data/tcd/tdf.csv to its pre-consolidation
content, and drops the consolidated data/tcd copies of ccf.txt and
tdf_legend.csv.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>