chore: decommission FMP, Finnhub and Alpha Vantage (A6)

The A5 cutover has been on and observed in production, so SEC Company Facts +
DoltHub earnings are already the live source for `fundamental_data`. This
removes everything the legacy path still occupied.

Gone: the three providers and their config/env keys; the weekly
`fundamental_collector` job; the cutover toggle (SEC + Dolt is now the
unconditional path, so `off` can no longer silently freeze scoring inputs); the
A5 parity report, whose deltas became structurally zero once the candidate
builder started writing the table it compared against; and the FMP tier of
universe bootstrap.

Two behavioral notes:

- Disabling **SEC Fundamentals Import** now stops the SEC network fetch only.
  The local cache refresh moved outside the job-enable check, because candidates
  also derive from daily closes and earnings events — freezing those on an
  ingestion pause would stale scoring with no fallback left to recover from.
- `/ingestion/fetch?sources=fundamentals` still accepts the key and reports
  `skipped`; there is no per-ticker fetch any more.

Migration 029 does not blanket-delete the leftover settings rows. Migrations run
before the service restart, and pre-A6 code reads an absent `job_*_enabled` row
as *enabled* — so the two behavior-bearing keys become tombstones pinned to safe
values (hidden in Admin) and only the inert three are deleted. Removing the
provider keys from the production `.env` is the matching rollout step.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

frontend/src/lib/types.ts

@@ -187,21 +187,15 @@ export interface ActivationConfig {
   exclude_neutral: boolean;
 }
 
-export interface FundamentalsCutoverConfig {
-  enabled: boolean;
-}
-
 // Cron schedule for morning / near-close / after-close / intraday + fundamentals
 export interface ScheduleConfig {
   schedule_timezone: string;
   schedule_daily_pipeline_cron: string;
   schedule_dolt_earnings_cron: string;
   schedule_sec_fundamentals_cron: string;
-  schedule_fundamentals_parity_cron: string;
   schedule_near_close_pipeline_cron: string;
   schedule_after_close_pipeline_cron: string;
   schedule_intraday_pipeline_cron: string;
-  schedule_fundamentals_cron: string;
 }
 
 // Runtime sentiment LLM configuration
@@ -892,7 +886,7 @@ export interface TickerUniverseSetting {
 
 export interface TickerUniverseBootstrapResult {
   universe: TickerUniverse;
-  /** Where the member list came from: wikipedia_sp500 | fmp | cache | seed | … */
+  /** Where the member list came from: wikipedia_sp500 | nasdaq_trader | cache | seed | … */
   source?: string;
   total_universe_symbols: number;
   added: number;