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>

deploy/provision_fundamentals.sh

@@ -15,7 +15,6 @@ MIN_FREE_GB="${DOLT_MIN_FREE_DISK_GB:-5}"
 EARNINGS_DIR="${DOLT_DATA_DIR}/${DOLT_EARNINGS_SUBDIR}"
 DOLT_IDENTITY_NAME="${DOLT_IDENTITY_NAME:-Signal Platform}"
 DOLT_IDENTITY_EMAIL="${DOLT_IDENTITY_EMAIL:-signal-platform@localhost}"
-FUNDAMENTALS_PARITY_REPORT_DIR="${FUNDAMENTALS_PARITY_REPORT_DIR:-/var/lib/signal-platform/reports/fundamentals-parity}"
 
 fail() {
   echo "ERROR: $*" >&2
@@ -80,8 +79,6 @@ check_env() {
     || fail "set DOLT_EARNINGS_SUBDIR=$DOLT_EARNINGS_SUBDIR in $ENV_FILE"
   grep -Eq '^SEC_USER_AGENT=.*@.*' "$ENV_FILE" \
     || fail "SEC_USER_AGENT in $ENV_FILE must contain a real contact email"
-  grep -Fqx "FUNDAMENTALS_PARITY_REPORT_DIR=$FUNDAMENTALS_PARITY_REPORT_DIR" "$ENV_FILE" \
-    || fail "set FUNDAMENTALS_PARITY_REPORT_DIR=$FUNDAMENTALS_PARITY_REPORT_DIR in $ENV_FILE"
 }
 
 check_all() {
@@ -104,15 +101,6 @@ check_all() {
   identity_email="$(repo_config_value user.email 2>/dev/null || true)"
   [[ -n "$identity_name" ]] || fail "missing Dolt user.name for $EARNINGS_DIR"
   [[ -n "$identity_email" ]] || fail "missing Dolt user.email for $EARNINGS_DIR"
-  [[ -d "$FUNDAMENTALS_PARITY_REPORT_DIR" ]] \
-    || fail "missing parity report directory: $FUNDAMENTALS_PARITY_REPORT_DIR"
-  if [[ "$(id -un)" == "$APP_USER" ]]; then
-    [[ -w "$FUNDAMENTALS_PARITY_REPORT_DIR" ]] \
-      || fail "parity report directory is not writable by $APP_USER"
-  else
-    runuser -u "$APP_USER" -- test -w "$FUNDAMENTALS_PARITY_REPORT_DIR" \
-      || fail "parity report directory is not writable by $APP_USER"
-  fi
   check_free_space
   check_env
   echo "OK: Dolt $DOLT_VERSION and earnings clone are provisioned"
@@ -139,7 +127,6 @@ fi
 version_ok || fail "Dolt $DOLT_VERSION installation failed"
 
 install -d -o "$APP_USER" -g "$APP_GROUP" -m 0750 "$DOLT_DATA_DIR"
-install -d -o "$APP_USER" -g "$APP_GROUP" -m 0750 "$FUNDAMENTALS_PARITY_REPORT_DIR"
 check_free_space
 
 if [[ ! -d "$EARNINGS_DIR/.dolt" ]]; then