perf(deploy): scope TS connection to demo DB + monthly-rotating database (250s -> <1s table imports)

merge: unify MCP (async TML import + concurrency + mcp_server) into integration

merge: liveboard-quality into integration/mcp-lb

liveboard quality: fix flat-72 defects + Tixr-style layout

chore: README, e2e grader, share-permission fix, sprint + quality results

fix(deploy): connectivity guard — scope model to one connected join graph (fixes 13122)

refactor(deploy): make TML import async-only (remove flag + sync branches)

feat(deploy): async TML import mode (TS_TML_IMPORT_MODE) — eliminates gateway 504s

fix: log the actual (resolved) model in semantics step, not stale llm_model

Log deployed code version

Improve backup liveboard path logging

Honor explicit custom dataset contracts

fix: retry transient ThoughtSpot auth failures

fix: reconcile ThoughtSpot connection creation

fix: accept valid undefined ThoughtSpot answer tokens

fix: detect invalid answer readiness before MCP liveboards

fix: extend ThoughtSpot 504 polling to 15 minutes

fix: recover liveboard creation after MCP answer failures

fix: recover tables from connection details

fix: validate recovered ThoughtSpot tables by connection

fix: import time for model readiness polling

fix: recover table creates via connection-scoped search

fix: normalize ThoughtSpot TML import object responses

fix: harden ThoughtSpot table polling and model readiness

fix: verify ThoughtSpot TML imports after 504

Merge remote-tracking branch 'origin/develop' into develop

test: harden e2e quality diagnostics

Merge remote-tracking branch 'hf-test/main' into develop

fix: harden dataset and ThoughtSpot deployment recovery

fix: wait for delayed ThoughtSpot table imports

chore: log table tml import calls

fix: harden ThoughtSpot table import recovery

fix: restore MCP-first liveboard answer flow

fix: tighten dataset quality and TS import retries

fix: recover ThoughtSpot imports after gateway timeouts

fix: enforce demo-safe data and liveboard layout

fix: improve run diagnostics and ts recovery

test: add dataset and liveboard prep seams

fix: use selected LLM for model semantics

fix: clarify dataset-first progress and import json scope

fix: chunk ThoughtSpot table imports

feat: add deployment notifications and tested demo updates

feat: add dataset-first generation path

fix: model GUID fallback + grader schema fix

fix: handle non-numeric/dict values in Snowflake inserts (22018 errors)

feat: AI viz title humanization + KPI fix + chart variety

feat: tag v2 type fix, claude-opus-4-6, viz titles sprint item, DATES fix

fix: remove all THOUGHTSPOT_URL admin fallbacks + data quality improvements

fix: remove matrix_config from fallback create_liveboard_from_model call

feat: march sprint — logging, run history, chat fixes, deploy sub-stages