ir: support new metadata chain flow

[carpawell]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 213 lines in your changes missing coverage. Please review.
✅ Project coverage is 27.84%. Comparing base (103d05c) to head (58ae7e5).
⚠️ Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/innerring/innerring.go	0.00%	119 Missing ⚠️
pkg/innerring/processors/meta_placement.go	0.00%	45 Missing ⚠️
...nnerring/processors/container/process_container.go	0.00%	28 Missing ⚠️
pkg/innerring/processors/netmap/process_epoch.go	0.00%	15 Missing ⚠️
pkg/innerring/processors/container/processor.go	0.00%	3 Missing ⚠️
pkg/innerring/internal/metachain/chain.go	0.00%	2 Missing ⚠️
pkg/innerring/processors/netmap/processor.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3984      +/-   ##
==========================================
- Coverage   27.95%   27.84%   -0.11%     
==========================================
  Files         684      683       -1     
  Lines       45755    45833      +78     
==========================================
- Hits        12792    12764      -28     
- Misses      31771    31876     +105     
- Partials     1192     1193       +1     

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[roman-khimov]

Requires test adjustments.

[Copilot]

Pull request overview

This PR introduces support for an experimental “metadata sidechain” flow in Inner Ring, wiring a meta-chain notary actor into IR processors so that metadata containers can be registered and their placements updated alongside the main FS-chain placement updates.

Changes:

• Add meta-chain bootstrap in IR (custom natives, ports remapping, notary deposit, notary actor creation) and pass the meta actor into processors.
• Update container processor to register a metadata container and push its initial placement to the meta sidechain.
• Update netmap epoch processing to also update meta-container placements when the container has the metadata-consistency attribute.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
pkg/innerring/processors/netmap/processor.go	Adds optional meta notary actor to netmap processor params/state.
pkg/innerring/processors/netmap/process_epoch.go	Triggers meta-chain placement updates during epoch placement refresh.
pkg/innerring/processors/meta_placement.go	New helper for building/sending meta-chain placement update notary calls + VUB calculation.
pkg/innerring/processors/container/processor.go	Adds meta actor dependency validation when meta feature is enabled.
pkg/innerring/processors/container/process_container.go	Registers meta container and updates its placement on meta sidechain during container approval.
pkg/innerring/internal/metachain/chain.go	Adds helper to build a meta sidechain blockchain with custom natives.
pkg/innerring/innerring.go	Boots meta sidechain, builds meta notary actor, introduces worker error propagation, adds port remapping helper.
pkg/innerring/config/config.go	Changes experimental.chain_meta_data from bool to structured metadata-chain config.
config/example/ir.yaml	Updates example config for new experimental.chain_meta_data structure.
cmd/neofs-ir/validate_test.go	Updates config validation test for new metadata config structure.
cmd/neofs-ir/defaults_test.go	Updates defaults validation test for new metadata config structure.

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