[AnikethCheluva]

Stack context

Reconnected above #275, preserving the existing PR number. Current order:
#263 → #267 → #268 → #269 → #270 → #272 → #273 → #274 → #275 → #271.

This moves only the explicit-entrypoint-links change; the heads of #272–275
are unchanged. The earlier #271 tip is retained locally as
backup/real-entrypoint-links-before-275-20261022.

What and why

All 28 runnable real experiment YAMLs now explicitly select model, data,
evaluator, trainer, callbacks and logger in their defaults. This includes the
three newer real/arcdur_abstime recipes. Optimizers remain model-owned;
shared experiment parents retain the task settings. _base/ files are internal
parents, not standalone run entrypoints.

No separate model= or data= argument is required:

python egomimic/trainHydra.py -m \
  +experiment=real/organize_stationary/arc_vel \
  hydra/launcher=submitit_lambda_h100_shared

Host paths, credentials, run identity and allocation preflight still apply.
This PR does not change the inherited absolute-duration, projection, dataset
selection or rollout algorithms. No remote checkout sync, launch or merge.

Verification after rebase

• 250 focused clock-contract, first-delay, config, recipe and rollout-contract
  tests passed on the combined stack.
• All 28 real entrypoints compose using a single experiment selector.
• Before/after resolved settings match for all 28 recipes when adding explicit
  links to the three newly inherited recipes (excluding generated W&B IDs and
  Hydra metadata).
• Graphite submission preview shows arc: one clock per arm, absolute-duration clocks with speed-bounded isotonic decode #272–275 as no-ops and only Link every component explicitly in real experiment entrypoints #271 changing.
• Whitespace checks passed. These are CPU/configuration checks, not a GPU
  training or physical robot safety certification.

[AnikethCheluva]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
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• Link every component explicitly in real experiment entrypoints #271 👈 (View in Graphite)
• arc: projection stream #275 : 1 other dependent PR (#279 )
• configs, tests: nine real task leaves on the frozen pools; drop the experimental menu and the non-functional tests #277 : 1 other dependent PR (#278 )
• robot: 20 N rollout gripper force limit with a live per-arm dashboard control #274
• arc: one clock per arm, absolute-duration clocks with speed-bounded isotonic decode #272 : 1 other dependent PR (#273 )
• Organize real and sim experiments and remove retired E1 surfaces #270
• configs: organize Cartesian experiments by task #269
• arc: consolidate velocity/duration clocks and M×18/M×20 streams #268
• arc: encode first-row start delays in non-E1 clocks #267
• Bring Aniketh's ARC work onto main with the YAM task recipes and the station rollout runtime #263 : 1 other dependent PR (#266 )
• main

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