- PdfProcessor and BankStatementExtractor raise upfront when
pdf_content.bytesize exceeds MAX_PDF_BYTES (32 MB, matching
Anthropic's hard limit). Previously a 100 MB PDF would be
base64-encoded (~133 MB) and packed into the JSON body before
the API rejected it — peak heap ~270 MB per Sidekiq worker.
- BankStatementExtractor inspects response.stop_reason; when the
model hit max_tokens it logs a warning and flags result[:truncated]
so downstream callers know the transaction list may be incomplete.
- ISO date pattern added to statement_period_start/end schema in
PdfProcessor so the model can't return "March 2026" — Anthropic
enforces the regex via the tool's input_schema.
Tests cover the size guard (raises before any client.messages call),
truncated-result flagging, and the warning log path.
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