fix(core): wait for paid quote subscription states

[Egge21M]

Summary

• Make quote subscription wait helpers ignore non-terminal/current-state notifications.
• Resolve mint quote waits only on PAID or ISSUED, and melt quote waits only on PAID.
• Add focused SubscriptionApi unit coverage for initial unpaid/pending notifications.
• Add a patch changeset for @cashu/coco-core.

Problem

Fakewallet quote subscriptions may first emit the current quote state, which can still be UNPAID. awaitMintQuotePaid previously resolved on the first notification, so minting could continue too early and fail with Quote not paid.

Verification

• bun run --filter='@cashu/coco-core' test -- test/unit/SubscriptionApi.test.ts
• bun run --filter='@cashu/coco-core' typecheck
• bun run --filter='@cashu/coco-adapter-tests' typecheck
• MINT_URL=https://bls.thesimplekid.dev ./scripts/test-integration.sh core passed locally in the existing dirty BLS worktree while diagnosing this failure.
• env BUN_TMPDIR=/tmp/codex-bun-tmp bunx @changesets/cli status --verbose

[changeset-bot]

🦋 Changeset detected

Latest commit: 952d3f9

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	Patch
@cashu/coco-adapter-tests	Patch
@cashu/coco-expo-sqlite	Patch
@cashu/coco-indexeddb	Patch
@cashu/coco-react	Patch
@cashu/coco-sqlite-bun	Patch
@cashu/coco-sqlite	Patch

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

[codecov]

Codecov Report

❌ Patch coverage is 94.59459% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.50%. Comparing base (c321b30) to head (952d3f9).

Files with missing lines	Patch %	Lines
packages/core/api/SubscriptionApi.ts	94.59%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #181      +/-   ##
==========================================
+ Coverage   84.29%   84.50%   +0.21%     
==========================================
  Files         115      115              
  Lines       13928    13946      +18     
==========================================
+ Hits        11740    11785      +45     
+ Misses       2188     2161      -27     

Flag	Coverage Δ
core-integration	54.01% <ø> (ø)
core-unit	87.79% <94.59%> (+0.23%)	⬆️

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