feat(runtime): add tenant-scoped Redis provider

[XnLemon]

Summary

Implements the tenant-scoped Redis runtime provider requested by #108.

• Adds Redis RuntimeStore and MemoryStore with atomic WATCH/MULTI updates.
• Covers Session/Event, inbound idempotency, event history, Reply Outbox, leases/fencing, retry/dead-letter, memory persistence, and index handoff.
• Wires explicit Redis bootstrap configuration, readiness PING, bounded timeouts, pool sizing, secret scoping, and fail-closed startup.
• Keeps the Redis ingress/outbox primary while Backend Profiles may independently select Redis or the existing in-memory provider for each tenant.
• Adds local Compose Redis service and updates runtime, deployment, README, and operations status documentation.
• Adds regression coverage for Redis cancellation priority, non-Redis source errors, and primary/fallback shutdown after bootstrap failure.

Issue ledger

• Redis RuntimeStore contract and MemoryStore capability.
• Tenant-scoped keys and atomic event/CAS/lease/fencing transitions.
• A Redis Profile for one tenant and an in-memory Profile for another materialize separate Session/Memory providers without shared state.
• Bootstrap/readiness/shutdown lifecycle and fail-closed unavailable backend.
• Deployment/configuration and operations status documentation.
• Formatting, tests, race, vet, build, lint, MkDocs strict, Compose config validation, and coverage.

Non-goals

S3/OSS, Qdrant/Milvus/pgvector, Redis-to-PostgreSQL migration/cutover tooling, OIDC/JWT admin auth, expanded tool policy, and rich IM work remain out of scope.

Validation

• go test ./...
• go test -race ./trpcservice/bootstrap ./trpcservice/runtime/storage/redis
• go vet ./...
• go build ./...
• golangci-lint run
• bash scripts/coverage.sh
• python -m mkdocs build --strict (from docs/)
• docker compose --env-file deploy/example.env -f deploy/docker-compose.yml config

Live Redis reconnect tests are opt-in via REDIS_RUNTIME_TEST_ADDR and skip explicitly when unset.

Closes #108

[codecov]

Codecov Report

❌ Patch coverage is 85.65170% with 131 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
trpcservice/runtime/storage/redis/redis.go	88.25%	44 Missing and 40 partials ⚠️
trpcservice/bootstrap/environment.go	76.26%	25 Missing and 22 partials ⚠️

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[XnLemon]

LGTM

[XnLemon]

LGTM