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feat: precompute cached_bytes per entry in DB (#13)

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Store how many bytes of each entry's artifacts are already on disk from
an earlier entry (content-addressed blob deduplication means shared
blobs are only stored once).

Design
------
- Add `cached_bytes INTEGER NOT NULL DEFAULT 0` to `archived_entries`
- Precompute at capture time via `database::refresh_entry_cached_bytes`
  called after all artifacts are saved for every capture path
  (web page, generic URL, tweet, yt-dlp/local)
- One-time migration in `initialize_schema`: detects missing column via
  PRAGMA table_info, ALTERs the table, then back-fills all existing rows
  with the correlated subquery
- `database::cascade_cached_bytes_after_delete` ready for when entry
  deletion is implemented; designed to run asynchronously after the
  delete is acknowledged to the user
- `cached_bytes` included in `EntrySummary` and all four SELECT paths
  (list_root_entries, search_entries, list_entries_for_collection,
  entries_for_tag) via the shared ENTRY_SELECT_COLS constant

Frontend
--------
- `EntryRow` shows a `% cached` sub-line under the size when non-zero,
  with a tooltip showing the raw cached byte count
- No separate API endpoint or extra fetch — value rides in the existing
  entries list response at zero extra query cost per read
This commit is contained in:
TheGeneralist 2026-07-03 11:56:55 +02:00 • committed by GitHub
parent c85cce579b
commit 90d17c9d25
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10 changed files with 161 additions and 21 deletions
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<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Archivr</title>
<script type="module" crossorigin src="/assets/index-BEbGvi2K.js"></script>
<link rel="stylesheet" crossorigin href="/assets/index-MrdP6h9x.css">
<script type="module" crossorigin src="/assets/index-DnX_j2fa.js"></script>
<link rel="stylesheet" crossorigin href="/assets/index-DXhicc6w.css">
</head>
<body>
<div id="root"></div>