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>

app/routers/ingestion.py

@@ -23,7 +23,6 @@ from app.models.sr_level import SRLevel
 from app.models.ticker import Ticker
 from app.models.user import User
 from app.providers.alpaca import AlpacaOHLCVProvider
-from app.providers.fundamentals_chain import build_fundamental_provider_chain
 from app.services.rr_scanner_service import (
     resolve_activation_ranks_for_symbol,
     scan_ticker,
@@ -31,7 +30,6 @@ from app.services.rr_scanner_service import (
 from app.services.sentiment_provider_service import build_sentiment_provider
 from app.schemas.common import APIEnvelope
 from app.services import (
-    fundamental_service,
     ingestion_service,
     scoring_service,
     sentiment_service,
@@ -185,34 +183,14 @@ async def fetch_symbol(
                 sources_out["sentiment"] = {"status": "error", "message": str(exc)}
 
     # --- Fundamentals ---
+    # No per-ticker fetch exists any more: fundamental_data is rebuilt for the
+    # whole universe by the nightly SEC + Dolt imports, from local PostgreSQL.
+    # The source key is still accepted so older clients get a truthful answer.
     if "fundamentals" in requested:
-        if settings.fmp_api_key or settings.finnhub_api_key or settings.alpha_vantage_api_key:
-            try:
-                fundamentals_provider = build_fundamental_provider_chain()
-                # Manual single fetch: take whatever we can get (a lone 429 on a
-                # fallback shouldn't fail the whole refresh).
-                fdata = await fundamentals_provider.fetch_fundamentals(
-                    symbol_upper, allow_partial=True
-                )
-                await fundamental_service.store_fundamental(
-                    db,
-                    symbol=symbol_upper,
-                    pe_ratio=fdata.pe_ratio,
-                    revenue_growth=fdata.revenue_growth,
-                    earnings_surprise=fdata.earnings_surprise,
-                    market_cap=fdata.market_cap,
-                    next_earnings_date=fdata.next_earnings_date,
-                    unavailable_fields=fdata.unavailable_fields,
-                )
-                sources_out["fundamentals"] = {"status": "ok", "message": None}
-            except Exception as exc:
-                logger.error("Fundamentals fetch failed for %s: %s", symbol_upper, exc)
-                sources_out["fundamentals"] = {"status": "error", "message": str(exc)}
-        else:
-            sources_out["fundamentals"] = {
-                "status": "skipped",
-                "message": "No fundamentals provider key configured",
-            }
+        sources_out["fundamentals"] = {
+            "status": "skipped",
+            "message": "Fundamentals refresh nightly from the SEC + Dolt imports",
+        }
 
     # --- Derived pipeline: S/R levels (free, always) ---
     try: