feat: Textile Slack Vault plugin for team archival and encrypted storage (resolves #212)

[s6pa1rta3n-lab]

Overview

This pull request implements the Textile Slack Vault plugin for team and organizational tools, addressing and resolving #212.

The plugin bridges organizational communication workflows (Slack) with Textile Hub Buckets, IPFS content-addressed storage, Filecoin cold storage archival deals, and ThreadDB audit logging.

Payout Stipulations Checklist (#212)

• Create a Textile plugin or add-on for a popular team or organizational tool (Slack).
• Integrate Textile Hub APIs (Buckets, ThreadDB, Powergate Filecoin deals).
• Implement content-addressable storage on IPFS with deterministic CIDv1 generation.
• Implement client-side envelope encryption with AES-256-GCM and PBKDF2 key derivation.
• Implement persistent cold storage archiving with Filecoin storage deals.
• Implement cryptographically attested audit trails via Ed25519 identity keypairs and ThreadDB.
• Implement Slack HMAC-SHA256 request signature verification with replay protection.
• Complete source code delivered in plugins/slack-textile-vault/.
• End-to-end interactive CLI demonstration runner (node dist/src/cli.js demo).
• Zero mocked assertions: 16 unit and integration tests passing in test/vault.test.ts.
• Comprehensive tutorial and written market analysis delivered in docs/docs/tutorials/slack-textile-vault.md.
• Navigation registered in docs/mkdocs.yml.

Implemented Components

1. Cryptographic Engine (plugins/slack-textile-vault/src/crypto.ts): AES-256-GCM authenticated encryption, PBKDF2 key derivation, Ed25519 digital signatures and DID generation, timing-safe Slack HMAC-SHA256 signature verification, and RFC-compliant base32 IPFS CIDv1 multihash generation.
2. Textile Hub Engine (plugins/slack-textile-vault/src/hub.ts): Bucket management (push, pull, pullByCid), Filecoin storage deal scheduling, and signed ThreadDB audit logs.
3. Slack Application Layer (plugins/slack-textile-vault/src/slack.ts): Interactive Block Kit UI formatting, slash commands (/textile pin, /textile get, /textile status, /textile archive, /textile share, /textile help).
4. Webhook Server (plugins/slack-textile-vault/src/server.ts): HTTP server handling Slack events and slash commands with signature verification, plus /health and /api/audit.
5. CLI Simulator (plugins/slack-textile-vault/src/cli.ts): Standalone test and demo harness for executing slash commands and inspecting audit logs.
6. Documentation & Market Strategy (docs/docs/tutorials/slack-textile-vault.md): Complete guide including target market analysis, expected demand, audience reach plans, and business model.

Verification

Automated test suite execution:

• Command: cd plugins/slack-textile-vault && npm test
• Results: 16 passing tests across 4 suites, 0 failures.

CLI demonstration execution:

• Command: cd plugins/slack-textile-vault && node dist/src/cli.js demo
• Results: All workflows (pinning, CID extraction, Filecoin deal verification, decryption, channel archiving, ThreadDB audit logs) succeeded.

Payout Routing

• EVM (Base/Arbitrum/Polygon/ETH): 0xF46C9F6d70C50BF81ef3588AB523a90a594a2F89
• Stellar: GCL6OXAMLD75BMTINA6EMRUDWK5THQUSHMYNLSNBCJAPZJHNYJTUNIBC