Add repository file archives and compact rank metadata

[Malkovsky]

• New serialization format: file archive

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 6dd0ddf548

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[codecov]

Codecov Report

❌ Patch coverage is 93.15726% with 57 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.80%. Comparing base (6683da7) to head (2156104).

Files with missing lines	Patch %	Lines
include/pixie/file_archive.h	91.39%	7 Missing and 22 partials ⚠️
include/pixie/wavelet_tree/index.h	85.00%	7 Missing and 14 partials ⚠️
include/pixie/rank_select/support.h	92.42%	2 Missing and 3 partials ⚠️
include/pixie/storage/aligned.h	92.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #63      +/-   ##
==========================================
+ Coverage   90.53%   90.80%   +0.27%     
==========================================
  Files          45       47       +2     
  Lines       11475    12302     +827     
  Branches     1721     1771      +50     
==========================================
+ Hits        10389    11171     +782     
+ Misses        535      532       -3     
- Partials      551      599      +48     

Flag	Coverage Δ
gcov	90.80% <93.15%> (+0.27%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: ec49150e50

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 520aa411d1

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".