chore(master): release synapse-sdk 0.30.0

[github-actions]

📦 Release Preparation

0.30.0 (2025-10-08)

Features

• add piece deletion to storage context (#285) (ac946dc)
• add session key support (#209) (0b0c983)

Bug Fixes

• generate-abi from correct contracts git tag (#279) (742c041)

Chores

• update mock service worker package version to 2.10.5 (e201a48)

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🚀 How to Release

1. Review the changelog and version bump in this PR
2. Merge this PR to trigger the release
3. After merging, the workflow will:
   • Create a GitHub release with tag ${version}
   • Publish to npm automatically
4. Wait until the workflow is complete before merging another release PR

⚠️ Note: The release has NOT been created yet. It will only be created after you merge this PR.

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	synapse-dev	c2e8fb3	Commit Preview URL Branch Preview URL	Oct 08 2025, 06:19 PM

[github-actions]

🤖 Created releases:

• synapse-sdk-v0.30.0

🌻