feat: add redis username

[qiankunli]

Summary by Sourcery

New Features:

• Support specifying Redis username for notifier and session storage

[sourcery-ai]

Reviewer's Guide

Introduces a Redis username parameter across notifier and session components by extending configuration structs, constructors, factory calls, and updating YAML examples to support authentication via username.

File-Level Changes

Change	Details	Files
Propagate Redis username through notifier initialization and adjust imports	Extended NewNotifier calls in factory to pass username Modified NewRedisNotifier signature to accept username Reordered import statements to group config import after zap	internal/mcp/storage/notifier/factory.go internal/mcp/storage/notifier/redis.go
Propagate Redis username through session store initialization	Extended NewRedisStore signature to accept username Updated NewStore factory call to pass username	internal/mcp/session/redis.go internal/mcp/session/factory.go
Add username field to Redis configuration structs	Added Username field to SessionRedisConfig Added Username field to RedisConfig in notifier config	internal/common/config/config.go internal/common/config/notifier.go
Update YAML examples to include Redis username	Added username entries under notifier.redis and session.redis in mcp-gateway.yaml Updated .env.example to include NOTIFIER_REDIS_USERNAME and SESSION_REDIS_USERNAME	configs/mcp-gateway.yaml .env.example

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[sourcery-ai]

Hey @qiankunli - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Documentation: all looks good

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[iFurySt]

LGTM! Thanks!