feat: Implement DB backend using pebble k/v database.

[ajnavarro]

Some benchmarks:

BenchmarkMemDBRandomReadsWrites-12    	 2050005	  619.0 ns/op	     129 B/op	       4 allocs/op
BenchmarkGoLevelDBRandomReadsWrites-12    303220	   4090 ns/op	     684 B/op	      13 allocs/op
BenchmarkPebbleDBRandomReadsWrites-12     258516	   6937 ns/op	      82 B/op	       3 allocs/op

BenchmarkMemlDBBatchWrites-12    	     2508206	  463.5 ns/op	     410 B/op	       3 allocs/op
BenchmarkGoLevelDBBatchWrites-12          925200       1517 ns/op       3255 B/op          2 allocs/op
BenchmarkPebbleDBBatchWrites-12    	     1934601	  649.0 ns/op	     121 B/op	       2 allocs/op

BenchmarkMemlDBIterator-12    	             705	2225342 ns/op	  746074 B/op	   10020 allocs/op
BenchmarkGoLevelDBIterator-12    	        1135	1146487 ns/op	   84513 B/op	   10014 allocs/op
BenchmarkPebbleDBIterator-12    	        2662	 409197 ns/op	     365 B/op	       5 allocs/op

Related issue: #1013

[Gno2D2]

🛠 PR Checks Summary

All Automated Checks passed. ✅

Manual Checks (for Reviewers):

• IGNORE the bot requirements for this PR (force green CI check)

Read More

🤖 This bot helps streamline PR reviews by verifying automated checks and providing guidance for contributors and reviewers.

✅ Automated Checks (for Contributors):

🟢 Maintainers must be able to edit this pull request (more info)

☑️ Contributor Actions:

1. Fix any issues flagged by automated checks.
2. Follow the Contributor Checklist to ensure your PR is ready for review.
   • Add new tests, or document why they are unnecessary.
   • Provide clear examples/screenshots, if necessary.
   • Update documentation, if required.
   • Ensure no breaking changes, or include BREAKING CHANGE notes.
   • Link related issues/PRs, where applicable.

☑️ Reviewer Actions:

1. Complete manual checks for the PR, including the guidelines and additional checks if applicable.

📚 Resources:

• Report a bug with the bot.
• View the bot’s configuration file.

Debug

Automated Checks

Maintainers must be able to edit this pull request (more info)

If

🟢 Condition met
└── 🟢 The pull request was created from a fork (head branch repo: ajnavarro/gno)

Then

🟢 Requirement satisfied
└── 🟢 Maintainer can modify this pull request

Manual Checks

**IGNORE** the bot requirements for this PR (force green CI check)

If

🟢 Condition met
└── 🟢 On every pull request

Can be checked by

• Any user with comment edit permission

[thehowl]

Did you manage to get results from supernova?

[codecov]

Codecov Report

Attention: Patch coverage is 10.32609% with 165 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
tm2/pkg/db/pebbledb/pebbledb.go	15.07%	107 Missing ⚠️
tm2/pkg/db/internal/test_common.go	0.00%	58 Missing ⚠️

📢 Thoughts on this report? Let us know!

[ajnavarro]

Did you manage to get results from supernova?

I didn't have time yet but I'll try to test it this week.