Add parsed document text, company segments, and OpenFIGI lookups (TJC-2470)

[arcaputo3]

Closes TJC-2470.

Quartr confirmed on 2026-09-10 that the parsed slides and reports datasets are enabled for our key. The live OpenAPI spec (https://api.quartr.com/public/v3/openapi.json) also carries two other additions the CLI did not wrap. This PR covers all three.

What's new

• quartr reports text <id> / quartr slides text <id> fetch Quartr's parsed Markdown (headings and tables preserved). The API returns a CDN textUrl rather than the text, so the command follows it and prints the Markdown on stdout by default. --output PATH writes a file (Saved <path> on stderr, like download), --metadata prints the envelope (documentId, textUrl, updatedAt), --with-api-key is the same opt-in as downloads. download still writes a file by default; both share a new saveURL helper.
• quartr companies segments <id> lists the /companies/{id}/segments child endpoint. Quartr marks the dataset legacy and it returns 403 on our tier.
• --openfigis on companies list, and companies resolve recognises an OpenFIGI by shape (BBG000B9XRY4) and queries openfigis instead of tickers.
• The 403 hint now names companies segments and reports text / slides text (a separately licensed package).
• Toolchain bumped to Go 1.27.1. The linter on PATH was built with 1.26.2 against a 1.27.1 GOROOT and panicked; CLAUDE.md and the pre-commit config now say to rebuild the linter whenever the toolchain moves.

Verified against the live API

$ quartr reports text 105446 | head -3
# Apple Inc.

## CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)

$ quartr slides text 152141 --metadata --format json
{"data":{"documentId":152141,"textUrl":"https://files.quartr.com/document-artifacts/…markdown?ref=VEpD", …}}

$ quartr companies resolve BBG000B9XRY4
id    name       country  matchedTickers
4742  Apple Inc  US       LSE:0R2V,BASE:AAPL,NasdaqGS:AAPL,…

$ quartr companies segments 4742
quartr api error: 403 Forbidden …
hint: 403 means this endpoint is not included in your API tier … `companies segments`, and `reports text` / `slides text` (the parsed documents package).

Docs

README (new Parsed documents and Company segments sections), CLAUDE.md, and the quartr skill: SKILL.md quick card and quirks, commands.md matrix, and a new recipe 3a for reading a filing as Markdown.

Tests

Nine new tests in internal/cli: stdout streaming, --output file write, --metadata without a CDN fetch, text rejected on transcripts, segments child list, openfigis forwarded to companies and dropped elsewhere, FIGI resolve, and the FIGI shape check. go test ./... and golangci-lint run are clean.

🤖 Generated with Claude Code

[cbelltjc]

LGTM 👍