feat(devframe): add request-bound tool progress

[dvcolomban]

Summary

• add AgentToolProgress and a request-bound AgentToolInvocationContext
• pass the optional invocation context to registered and provider tool handlers while preserving existing handlers and agent-enabled RPC signatures
• translate MCP progress tokens into ordered notifications/progress updates for route-based and stdio transports
• suppress reports after handler settlement and use a no-op reporter when the caller omits a progress token
• reject non-finite and non-increasing progress with the documented DF0071 diagnostic

Stacking

This draft is stacked on #292. Its upstream diff includes the resource work until #292 merges; rebase it onto the updated main before review.

Validation

• pnpm lint
• pnpm knip
• pnpm test — 1,336 passed, 9 skipped
• pnpm typecheck
• pnpm build

Follow-up

This implements the request-bound progress portion of #294. MCP Tasks remain pending on TypeScript SDK task support and the related request-routing and notification blockers.

Refs #294.

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