feat(spice): support the near-indexer under decoupled execution

[darioush]

Makes the near-indexer stream real data under spice (decoupled execution) instead of empty per-shard shells, and fills the receipt-persistence gap that surfaced once it did.

• Indexer: build_streamer_message no longer short-circuits under spice; the existing per-chunk loop runs unchanged. Under spice the view client already resolves Finality::None to the first executed ancestor, so the streamer only ever builds messages for already-executed blocks.
• Receipt bodies: spice chunks are tx-only, so the chain path's partial-chunk save never writes produced-receipt bodies to DBCol::Receipts, leaving get_receipt returning None for incoming receipts (e.g. gas refunds) that the indexer needs. The spice chunk executor now persists produced-receipt bodies by id, with a matching GC decrement (gc_spice_outgoing_receipt_bodies) and store-validator accounting so the DBCol::Receipts refcount stays balanced. All three legs are spice-gated per block; the non-spice path is unchanged.
• Tests: enables the seven previously spice-ignored test_indexer_* tests (three now anchor on the execution head rather than the consensus head()), and adds test_spice_outgoing_receipt_bodies_gc covering persist → GC with validate_store on both sides.

[Copilot]

Pull request overview

This PR enables the near-indexer to stream real execution data when running with SPICE (decoupled execution) by removing the SPICE short-circuit in streamer message construction. To support indexing under SPICE’s tx-only chunks, it also persists produced (outgoing) receipt bodies into DBCol::Receipts and adds corresponding GC + store-validator accounting to keep refcounts balanced. Test-loop indexer tests are re-enabled under SPICE, and a new GC test is added to cover the produced-receipt-body persist → GC lifecycle.

Changes:

• Remove the SPICE early-return in build_streamer_message so per-chunk indexing runs under SPICE.
• Persist SPICE-produced outgoing receipt bodies into DBCol::Receipts, and GC/decrement them in tandem with OutgoingReceipts cleanup, including store-validator refcount accounting.
• Re-enable previously SPICE-ignored indexer tests and add a targeted GC test for outgoing receipt bodies under SPICE.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test-loop-tests/src/tests/processed_receipts_gc.rs	Adds SPICE-only test verifying produced receipt bodies are persisted and later GC’d with refcount validation.
test-loop-tests/src/tests/indexer.rs	Re-enables indexer tests under SPICE and adjusts height anchoring to use execution head where needed.
core/store/src/adapter/chain_store.rs	Adds ChainStoreUpdateAdapter::save_receipt to centralize receipt-body refcount persistence.
chain/indexer/src/streamer/mod.rs	Removes SPICE short-circuit so streamer messages include full per-chunk data under SPICE.
chain/client/src/spice/chunk_executor_actor/per_shard.rs	Persists SPICE-produced outgoing receipt bodies into DBCol::Receipts during chunk postprocessing.
chain/chain/src/store/mod.rs	Switches chain-path receipt persistence to call the new adapter helper.
chain/chain/src/store_validator/validate.rs	Adds SPICE-gated validation accounting for OutgoingReceipts → Receipts refcounts.
chain/chain/src/store_validator.rs	Hooks OutgoingReceipts into store validation and ensures validation order accounts for it before Receipts.
chain/chain/src/garbage_collection.rs	Adds SPICE-gated GC decrement for produced outgoing receipt bodies prior to deleting OutgoingReceipts.

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[codecov]

Codecov Report

❌ Patch coverage is 76.47059% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.06%. Comparing base (466bb50) to head (b74f594).
⚠️ Report is 12 commits behind head on master.

Files with missing lines	Patch %	Lines
chain/chain/src/store_validator/validate.rs	57.89%	8 Missing ⚠️
chain/chain/src/garbage_collection.rs	87.50%	0 Missing and 2 partials ⚠️
chain/chain/src/store_validator.rs	75.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #16010      +/-   ##
==========================================
+ Coverage   72.66%   73.06%   +0.39%     
==========================================
  Files         952      856      -96     
  Lines      205109   186724   -18385     
  Branches   205109   186724   -18385     
==========================================
- Hits       149048   136428   -12620     
+ Misses      51075    45944    -5131     
+ Partials     4986     4352     -634     

Flag	Coverage Δ
pytests-nightly	1.23% <0.00%> (+0.13%)	⬆️
unittests	69.69% <50.98%> (+0.10%)	⬆️
unittests-nightly	69.69% <50.98%> (+0.08%)	⬆️
unittests-spice	65.44% <43.13%> (-0.15%)	⬇️

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