feat: add optimized batch mint finalization

[Egge21M]

This pull request adds output-deferred single minting and optimized BOLT11 batch mint finalization for NUT-29-capable mints.

Problem

Preparing output data at quote creation prevents multiple paid quotes from being combined into better denomination splits. That keeps single 23-sat quotes at 16,4,2,1 each, instead of allowing three quotes to mint as 64,4,1.

Summary

• Moves single mint output-data creation to execution, persisted before calling the mint.
• Adds batch attempt persistence and recovery metadata across core and storage adapters.
• Adds a shared SQLite-backed integration test proving three 23-sat quotes mint into 3 consolidated proofs.
• Updates the integration mint image to cashubtc/mintd:v0.16.0.
• Adds .changeset/batch-minting.md.

Verification

• bun --cwd packages/adapter-tests typecheck
• bun --cwd packages/core typecheck
• bun --cwd packages/core test:unit
• bun --cwd packages/sqlite3 typecheck
• bun --cwd packages/sqlite-bun typecheck
• bun --cwd packages/expo-sqlite typecheck
• bun --cwd packages/indexeddb typecheck
• ./scripts/test-integration.sh sqlite3
• targeted batch integration for sqlite3, sqlite-bun, and expo-sqlite

IndexedDB browser integration was skipped because Playwright does not work on this system.

Changeset

• Added .changeset/batch-minting.md.

[changeset-bot]

🦋 Changeset detected

Latest commit: 3d10d7e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 7 packages

Name	Type
@cashu/coco-core	Major
@cashu/coco-indexeddb	Major
@cashu/coco-expo-sqlite	Major
@cashu/coco-sqlite	Major
@cashu/coco-sqlite-bun	Major
@cashu/coco-adapter-tests	Major
@cashu/coco-react	Major

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[codecov]

Codecov Report

❌ Patch coverage is 28.27939% with 421 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.79%. Comparing base (b3ae3f8) to head (3d10d7e).

Files with missing lines	Patch %	Lines
...kages/core/operations/mint/MintOperationService.ts	21.93%	242 Missing ⚠️
...ages/core/infra/handlers/mint/MintBolt11Handler.ts	12.50%	91 Missing ⚠️
...itories/memory/MemoryMintBatchAttemptRepository.ts	22.64%	41 Missing ⚠️
...s/core/services/watchers/MintOperationProcessor.ts	68.53%	28 Missing ⚠️
packages/core/services/MintService.ts	10.00%	18 Missing ⚠️
packages/core/operations/mint/MintOperation.ts	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #165      +/-   ##
==========================================
- Coverage   84.28%   81.79%   -2.49%     
==========================================
  Files         115      117       +2     
  Lines       13922    14543     +621     
==========================================
+ Hits        11734    11896     +162     
- Misses       2188     2647     +459     

Flag	Coverage Δ
core-integration	54.62% <ø> (+0.60%)	⬆️
core-unit	84.70% <28.27%> (-2.85%)	⬇️

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