Fix P0 issues in financial ingestion architecture

- Wrap snapshot updates in transactions with error context for each child table
- Add sidecar retry with exponential backoff (3 attempts, 2s base, 10s max, 30% jitter)
- Add HTTP timeout (30s per request) and SEC rate limiting (10 req/s) in Rust
- Add XBRL validation with status reporting (checks root element, tag balance)

lib/server/taxonomy/parser-client.ts

@@ -1,6 +1,7 @@
 import { existsSync } from 'node:fs';
 import { join } from 'node:path';
 import type { TaxonomyHydrationInput, TaxonomyHydrationResult } from '@/lib/server/taxonomy/types';
+import { withRetry } from '@/lib/server/utils/retry';
 
 function candidateBinaryPaths() {
   return [
@@ -23,6 +24,10 @@ export function resolveFiscalXbrlBinary() {
 export async function hydrateFilingTaxonomySnapshotFromSidecar(
   input: TaxonomyHydrationInput
 ): Promise<TaxonomyHydrationResult> {
+  return withRetry(() => hydrateFromSidecarImpl(input));
+}
+
+async function hydrateFromSidecarImpl(input: TaxonomyHydrationInput): Promise<TaxonomyHydrationResult> {
   const binary = resolveFiscalXbrlBinary();
   const timeoutMs = Math.max(Number(process.env.XBRL_ENGINE_TIMEOUT_MS ?? 45_000), 1_000);
   const command = [binary, 'hydrate-filing'];