This PR introduces key-value storage blocks.
### Changes 🏗️
- **Database Schema**: Add AgentNodeExecutionKeyValueData table with
composite primary key (userId, key)
- **Persistence Blocks**: Create PersistInformationBlock and
RetrieveInformationBlock in persistence.py
- **Scope-based Storage**: Support for within_agent (per agent) vs
across_agents (global user) persistence
- **Key Structure**: Use formal # delimiter for storage keys:
`agent#{graph_id}#{key}` and `global#{key}`
### Checklist 📋
#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
- [x] Run all 244 block tests - all passing ✅
- [x] Test PersistInformationBlock with mock data storage
- [x] Test RetrieveInformationBlock with mock data retrieval
- [x] Verify scope-based key generation (within_agent vs across_agents)
- [x] Verify database function integration through all manager classes
- [x] Run lint and type checking - all passing ✅
- [x] Verify database migration is included and valid
#### For configuration changes:
- [x] `.env.example` is updated or already compatible with my changes
- [x] `docker-compose.yml` is updated or already compatible with my
changes
- [x] I have included a list of my configuration changes in the PR
description (under **Changes**)
Note: This change adds database schema and new blocks but doesn't
require environment or docker-compose changes as it uses existing
database infrastructure.
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Co-authored-by: Claude <noreply@anthropic.com>
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