Delay loading to shrink page size

[eyeseast]

Fixes #837

Test URL: https://deploy-preview-839.muckcloud.com/documents/20006876-2017-epa-staff-calendars-part2-s/

The issue seems to be that server-side rendering every page in a giant document produces a huge HTML page that's too big for our Lambda workers to push it through.

This PR fixes it, but we should do another pass and see if we can slim down our pages further.

[sentry-io[bot]]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: src/lib/load/document.ts

Function	Unhandled Issue
load	SyntaxError: Unexpected token '%', "%PDF-1.4 /doc... Event Count: 1 Affected Users: 1
load	TypeError: Failed to construct 'URL': Invalid URL /documents/25279468-aritzia-inc-q2-2025-mda... Event Count: 1 Affected Users: 1

📄 File: src/routes/(app)/documents/[id]-[slug]/+page.ts (Click to Expand)

| Function | Unhandled Issue | | :------- | :----- | | **`load`** | [**SyntaxError: Unexpected token '%', "%PDF-1.4**](https://muckrock.sentry.io/issues/6062860173/?referrer=github-open-pr-bot) /doc...
`Event Count:` **1** `Affected Users:` **1** | | **`load`** | [**TypeError: Failed to construct 'URL': Invalid URL**](https://muckrock.sentry.io/issues/6062860391/?referrer=github-open-pr-bot) /documents/25279468-aritzia-inc-q2-2025-mda...
`Event Count:` **1** `Affected Users:` **1** |

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[github-actions[bot]]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	30.84%	6674 / 21634
🔵	Statements	30.84%	6674 / 21634
🔵	Functions	49.54%	273 / 551
🔵	Branches	75.37%	1007 / 1336

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/lib/components/common/Paginator.svelte	0%	0%	0%	0%	1-144
src/lib/components/forms/Reprocess.svelte	0%	0%	0%	0%	1-166
src/lib/components/inputs/Language.svelte	100%	100%	100%	100%
src/lib/components/layouts/ContentLayout.svelte	0%	0%	0%	0%	1-19
src/lib/components/layouts/DocumentLayout.svelte	0%	0%	0%	0%	1-73
src/lib/components/viewer/Notes.svelte	0%	0%	0%	0%	1-47
src/lib/components/viewer/PDF.svelte	0%	0%	0%	0%	1-917
src/lib/components/viewer/PaginationToolbar.svelte	0%	0%	0%	0%	1-1810
src/lib/components/viewer/Text.svelte	0%	0%	0%	0%	1-42
src/lib/components/viewer/Viewer.svelte	0%	0%	0%	0%	1-108
src/lib/components/viewer/ViewerContext.svelte	0%	0%	0%	0%	1-199
src/lib/load/document.ts	0%	0%	0%	0%	1-39
src/routes/(app)/documents/[id]-[slug]/+page.svelte	0%	0%	0%	0%	1-65
src/routes/(app)/documents/[id]-[slug]/+page.ts	0%	0%	0%	0%	1
src/routes/embed/documents/[id]-[slug]/+page.svelte	0%	0%	0%	0%	1-47
src/routes/embed/documents/[id]-[slug]/+page.ts	0%	0%	0%	0%	1

Generated in workflow #740 for commit 631d8cf by the Vitest Coverage Report Action

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