Remove duplicated release-prefix root mirror files

gwam_v12_sparse_v2/docs/QA_AND_LEAKAGE.md

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-# GWAM_Data v1.2 sparse-v2 QA and leakage guards
-
-## Required shape checks
-
-```text
-node_state: float32[T, 256, 32]
-node_state_schema: str[32]
-view_evidence: must agree with visible mask pair set
-dynamic_edges: sparse JSONL, contact + visibility_change only
-Phase 2: sparse visible-only features; no dense visual tensor required
-```
-
-Reject stale v1/v1.1 expectations such as 317/323-D node features, dense `rel_state`, dense `visual_views`, or `distractor` family index 1.
-
-## Phase 1 checks
-
-- `_PHASE1_DONE.json` exists for every packaged episode.
-- `graph_static.json` schema is `GWAM_Data_v1.2_phase1_sparse_v2`.
-- All packaged episodes share one identical `rule_versions` blob.
-- `node_state` has no NaN/Inf.
-- Padded rows are all-zero; active rows are selected via the active channel.
-- `view_evidence` visible pairs exactly match RLE mask visible pairs.
-- Dynamic-edge indices are valid and edge vocab is only `contact` / `visibility_change`.
-- Actions are present and non-null in `frames.jsonl`.
-
-## Phase 2 checks
-
-For every packaged episode with Phase 2:
-
-- `audit/phase2_summary.json` exists.
-- No invisible features are injected.
-- Valid and invalid sparse visual-feature pairs partition the Phase 1 visible pair set.
-- Valid feature vectors are fp16 and unit-normalized.
-- No duplicate feature pairs.
-
-## Leakage guards
-
-Model-input tensors must not contain task-goal labels or target-relevance bits.
-
-Default model inputs may use:
-
-```text
-node_state active rows
-sparse dynamic_edges
-Phase 2 visible-only features and their pair indices
-action/robot streams when explicitly included
-```
-
-Treat these as metadata/supervision-only unless explicitly allowed:
-
-```text
-instruction
-fixture_refs
-object_roles
-goal metadata
-node_id strings
-source strings
-frames.jsonl timestamp/index/next.done
-```
-
-Node ordering can correlate with object config order; do not use raw node slot position as semantic signal unless studying that bias explicitly.
-
-## Known documented exceptions
-
-- `target/OpenDrawer/episode_000459` is excluded due source env-init failure.
-- Six target tasks are state-blind in `node_state`: CloseFridge, OpenStandMixerHead, SlideDishwasherRack, TurnOffStove, TurnOnElectricKettle, TurnOnMicrowave. They need a future `fixture_state.npz` sidecar or narrower dataset-card claims.