v5.3.0 - Surgical note editing + mcp SDK v2

Added

• Surgical note editing. New note_edit_string MCP tool replaces an exact
  substring inside a note instead of rewriting the whole content. This
  directly counters the append-culture that grows notes unbounded: a stale line
  can be replaced in place rather than by appending a correction block. Matching
  is literal (not regex) and mirrors an exact-match code editor - it refuses
  when old_string is not found, or matches more than once while replace_all
  is False, forcing the caller to add surrounding context or opt in explicitly.
  Results exceeding the 500 KB content limit are refused, never silently
  truncated. The replacement is computed in Python and written through the
  normal parametrized UPDATE, so there is no SQL-injection surface.

• Search within a note. New note_grep MCP tool returns only the matching
  lines plus surrounding context (with 1-based line numbers, overlapping windows
  merged), letting a caller locate the exact text to feed into note_edit_string
  without pulling a large note into context. The line-number prefix is display
  only and must not be copied into old_string.

• Partial note reads. note_show gained optional start_line / end_line
  parameters to return only a line range of a large note, using the same line
  numbers as note_grep. Without them the full note is returned as before.

  Together these turn a big note from an all-or-nothing load into something a
  session can inspect and maintain a slice at a time - fewer tokens on read, and
  a smaller blast radius than a whole-content rewrite on edit.

Changed

• Upgraded to the mcp Python SDK v2 (~=1.0 -> ~=2.2). In SDK v2 the
  high-level server class FastMCP was renamed to MCPServer and moved to
  mcp.server.mcpserver; the server now imports and instantiates MCPServer.
  The tool and resource surface is unchanged - all tools keep their names,
  parameters and generated schemas, and the stdio transport is unaffected - so
  there is no change for MCP clients. Installing this release pulls SDK v2 and
  its dependencies (notably httpx2, opentelemetry-api and pydantic>=2.12);
  the minimum Python version is unchanged (>=3.10).