v1.5.5: rmcp 1.4, auto_link parameter, reindex_file tool

[devwhodevs]

Summary

• rmcp 1.2 → 1.4 — host validation, non-Send handler support, transport fixes. Does not fix MCP tools not surfaced in Claude Desktop Cowork/Code modes despite successful connection #20 (blocked upstream on When is 2025-11-25 protocol version support expected? modelcontextprotocol/rust-sdk#800).
• auto_link parameter on create — set to false to skip automatic wikilink resolution. Discovered links still appear as suggestions. Wired through MCP, HTTP, CLI, and OpenAPI.
• reindex_file MCP tool + HTTP endpoint — re-indexes a single file after external edits. Reads from disk, re-embeds chunks, rebuilds edges. POST /api/reindex-file.

Changes

• MCP tools: 22 → 23
• HTTP endpoints: 23 → 24
• OpenAPI version: 1.5.0 → 1.5.5
• Added #[allow(dead_code)] on tool_router field (rmcp 1.4 macro change triggers clippy)

Test plan

• cargo fmt --check — clean
• cargo clippy -- -D warnings — clean
• cargo test --lib — 450 passed
• Real vault test: reindex_file on 07-Daily/2026-04-09.md — 5 chunks, docid returned
• Real vault test: create with auto_link: false — links_added: [], names in links_suggested
• Real vault test: create with default — links_added contains auto-linked people