review: address CarolinePascal feedback

- name the three modules everywhere (plan / interjections / vqa) instead
  of module_1/2/3 — config classes, config fields, executor params,
  staging keys and phase names now carry the module name
- rename examples/annotation -> examples/annotations; add the Apache
  header to run_hf_job.py
- drop the unused GeneralVqaModule._generate_one
- remove "PR 1" references from comments/docstrings
- frames.py: rely on the always-defined LeRobotDatasetMetadata.camera_keys
- executor.py: read/write meta/info.json via load_info / write_info
- reader.py: load meta/tasks.parquet via io_utils.load_tasks
- make --push_to_hub a bool; push the annotated dataset back to --repo_id
- move the on-disk test dataset builder into tests/fixtures
  (build_annotation_dataset); run_e2e_smoke reuses it
- clarify in the docs that the vqa module grounds each pair on a single
  frame (K = per-tick anchor count)
- hoist stdlib dynamic imports to module scope

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/annotations/test_pipeline_recipe_render.py

@@ -23,9 +23,9 @@ import pyarrow.parquet as pq
 
 from lerobot.annotations.steerable_pipeline.config import (
     AnnotationPipelineConfig,
-    Module1Config,
-    Module2Config,
-    Module3Config,
+    InterjectionsConfig,
+    PlanConfig,
+    VqaConfig,
 )
 from lerobot.annotations.steerable_pipeline.executor import Executor
 from lerobot.annotations.steerable_pipeline.modules import (
@@ -115,15 +115,15 @@ def _build_executor() -> Executor:
         },
     )
     config = AnnotationPipelineConfig(
-        module_1=Module1Config(),
-        module_2=Module2Config(max_interjections_per_episode=1, interjection_min_t=0.5),
-        module_3=Module3Config(vqa_emission_hz=1.0, K=2),
+        plan=PlanConfig(),
+        interjections=InterjectionsConfig(max_interjections_per_episode=1, interjection_min_t=0.5),
+        vqa=VqaConfig(vqa_emission_hz=1.0, K=2),
     )
     return Executor(
         config=config,
-        module_1=PlanSubtasksMemoryModule(vlm=vlm, config=config.module_1),
-        module_2=InterjectionsAndSpeechModule(vlm=vlm, config=config.module_2, seed=config.seed),
-        module_3=GeneralVqaModule(vlm=vlm, config=config.module_3, seed=config.seed),
+        plan=PlanSubtasksMemoryModule(vlm=vlm, config=config.plan),
+        interjections=InterjectionsAndSpeechModule(vlm=vlm, config=config.interjections, seed=config.seed),
+        vqa=GeneralVqaModule(vlm=vlm, config=config.vqa, seed=config.seed),
         writer=LanguageColumnsWriter(),
         validator=StagingValidator(),
     )