Fixed assets, fully featured: tags, serials, acquisition links, label sheets, the fixed asset register, and an Assets section in the viewer; fix a flaky verify

- core: asset tags (generated PREFIX-0001 or the human's own; unique ignoring case; never reused by another asset) and serial numbers (rules.md B-24); a journaled link from an asset to the entry that acquired it (posted, unreversed, debiting the cost account); fixed_asset_register(as_of), reconciled to the GL (unposted depreciation, unregistered cost)
- store: asset.tagged, asset.serial_set, asset.acquisition_linked journaled, replayed, projected (schema v9); differs_from now also compares control roles and tag history
- config: [books] asset_tag_prefix, default the company's initials without legal-form words
- import: Avery 5160/8160 label sheets with QR codes (geometry vendored from Avery, docs/spec/sources/avery-5160.md); the register as XLSX and PDF
- mcp: register_asset tags (and links) automatically; books.label_asset, books.asset_labels; asset tools take a tag; books.show asset / assets page / register report; export fixed_asset_register (json, csv, xlsx, pdf) and in the CPA package
- viewer: Assets page (register, reconciliation), asset page (identity, schedule posted vs not, entries, documents), Fixed asset register report, global search by tag/serial/description, journal text, needs-attention items
- fix: verify compared snapshot amounts as strings; a zero total summed in hash-map order could print "0" or "0.00", so agreeing books failed verify at random. Now by value (regression test)
- tests: spec-blind suites for tags, register, prefix, store, MCP; label and register PDF/XLSX tests; viewer tests

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GWVo7x3UHw5kwCUaWxiejX

crates/ledger-import/src/lib.rs

@@ -6,20 +6,26 @@
 //! - [`report`]: the statement layout every renderer draws from.
 //! - [`xlsx`]: generate XLSX reports.
 //! - [`pdf`]: generate PDF financial statements (CPA handoff).
+//! - [`asset_register`]: the fixed asset register as XLSX and PDF.
+//! - [`labels`]: print asset label sheets with QR codes.
 //!
 //! All money stays `Decimal`; no floats in money paths.
 
+pub mod asset_register;
 pub mod bank_csv;
 pub mod chart_csv;
 pub mod iif;
+pub mod labels;
 pub mod pdf;
 pub mod report;
 pub mod templates;
 pub mod xlsx;
 
+pub use asset_register::{asset_register_pdf, asset_register_xlsx};
 pub use bank_csv::{BankCsvError, BankTransaction, DateOrder, parse_bank_csv, parse_bank_csv_with};
 pub use chart_csv::{ChartRow, parse_chart_csv};
 pub use iif::{IifAccount, IifError, QbAccountType, iif_accounts, journal_to_iif};
+pub use labels::{AssetLabel, LabelSheet, asset_labels_pdf};
 pub use pdf::{PdfError, statement_pdf};
 pub use report::{Member, ReportMeta, Row, RowKind, Statement, YearEarnings, format_amount};
 pub use templates::{ChartTemplate, EntityType, chart_template};