[SCAL-327336] Fix org tools disappearing after token expiry: reconcile token before getSessionInfo

[rohitthughtspot]

SCAL-327336

Problem

After a cold-start reconnect (~24h, once the frozen props access token has expired), list_orgs/switch_org disappear and feature-flag gating misbehaves — even though the keep-warm token is still valid.

Cause

sessionInfo is fetched once at init via getSessionInfo(), which previously ran before postInit reconciled the keep-warm global token from the token-store DO. On a post-expiry reconnect the init fetch authenticated with the dead frozen props token, failed, and left sessionInfo null for the DO's lifetime. Org-tool visibility and flag gating read sessionInfo, so they silently degraded — while the DO still held a valid token (data calls, which reconcile the DO token at call time, kept working).

Fix

• Reorder — a preInit() hook reconciles the global token from the token-store DO before initializeService()/getSessionInfo, so the init fetch uses the kept-warm token and sessionInfo populates correctly.
• ensureSessionInfo() — fallback in listTools that refetches session info if it's still null (e.g. a transient init failure), guarded by an in-flight promise so concurrent list calls share one fetch (no duplicate getSessionInfo / MixpanelTracker).
• isOrgsEnabled() defaults to true when sessionInfo is absent, so org tools stay visible in the brief window before the refetch completes.
• callTool reconciles the global token per call keyed on the absence of an active org token.
• Extract postInit's active-org bootstrap into ensureActiveOrg().

Test

Regression test reproduces the failure (init getSessionInfo fails on an expired props token; DO holds a valid token) and asserts the repair restores sessionInfo and the org tools. Full suite passes (695 tests).

Supersedes #184 (rebased onto latest main as a single clean commit).

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