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/api/admin.ts

@@ -4,7 +4,6 @@ import type {
   AdminUser,
   AlertConfig,
   AlertTestResult,
-  FundamentalsCutoverConfig,
   PipelineReadiness,
   RecommendationConfig,
   ScheduleConfig,
@@ -57,18 +56,6 @@ export function updateSetting(key: string, value: string) {
     .then((r) => r.data);
 }
 
-export function getFundamentalsCutoverSettings() {
-  return apiClient
-    .get<FundamentalsCutoverConfig>('admin/settings/fundamentals-cutover')
-    .then((r) => r.data);
-}
-
-export function updateFundamentalsCutoverSettings(enabled: boolean) {
-  return apiClient
-    .put<FundamentalsCutoverConfig>('admin/settings/fundamentals-cutover', { enabled })
-    .then((r) => r.data);
-}
-
 export function getRecommendationSettings() {
   return apiClient
     .get<RecommendationConfig>('admin/settings/recommendations')
@@ -246,40 +233,6 @@ export interface TriggerJobResponse {
   cadence?: BacktestCadence;
 }
 
-export interface ParityFieldStats {
-  legacy_available: number;
-  candidate_available: number;
-  both_available: number;
-  material_differences: number;
-  median_absolute_delta: number | null;
-  p95_absolute_delta: number | null;
-  max_absolute_delta: number | null;
-}
-
-export interface FundamentalsParityReport {
-  report_version: number;
-  generated_at: string;
-  as_of_date: string;
-  approval_status: string;
-  read_only: boolean;
-  summary: {
-    universe_count: number;
-    legacy_fundamental_score_available: number;
-    candidate_fundamental_score_available: number;
-    fundamental_scores_compared: number;
-    fundamental_score_material_changes: number;
-    fundamental_rank_changes: number;
-    field_stats: Record<string, ParityFieldStats>;
-  };
-  source_runs: Record<string, {
-    run_id: number;
-    status: string;
-    revision: string | null;
-    source_max_date: string | null;
-    completed_at: string | null;
-  } | null>;
-}
-
 export type BacktestTargetModel = 'production_gtl' | 'structural_sr';
 export type BacktestCadence = 'weekly' | 'daily';
 
@@ -306,24 +259,6 @@ export function triggerJob(
     .then((r) => r.data);
 }
 
-export function getFundamentalsParityReport() {
-  return apiClient
-    .get<FundamentalsParityReport | null>('admin/fundamentals-parity')
-    .then((r) => r.data);
-}
-
-export function getFundamentalsParityCsv() {
-  return apiClient
-    .get<{ filename: string; content: string } | null>('admin/fundamentals-parity/csv')
-    .then((r) => r.data);
-}
-
-export function getFundamentalsParityJson() {
-  return apiClient
-    .get<{ filename: string; content: string } | null>('admin/fundamentals-parity/json')
-    .then((r) => r.data);
-}
-
 // System events (operational warnings / errors)
 export interface SystemEvent {
   id: number;