Document the SQL queries used to build a comprehensive SIP trunk
inventory (device + sipdevice + siptrunkdestination joins, plus
route_lists_and_groups for membership). Captures rationale for each
column, common gotchas (routelistdetail doesn't exist, lvarchar(1)
flag fields return 't'/'f' strings), and a draft prompt signature
suggesting how to extract this into a @mcp.prompt function in
server.py — same shape as the existing route_plan_overview /
investigate_pattern / audit_routing prompts.
Empty src/mcp_cucm_axl/prompts/ directory remains unused; this lives
under docs/ since it's reference material rather than a runtime
prompt. Future commit can promote the queries into the prompt
function and delete this if redundant.
Live result snapshot included for reference (CUCM 15.0.1.12900-234,
2026-04-25, 11 trunks).
