feat: implement bloom-filter-v3 and git-miner

[daedalus]

Summary

• Supersedes PR Content hash DB with bloom filter #424 and PR feat(git_miner): add git mode — mines repo commit by commit, branch by branch #1050
• Implements bloom-filter-v3 (content hash DB with Bloom filter for smarter deduplication)
• Implements git-miner (mine git repos commit-by-commit, branch-by-branch)

Changes

bloom-filter-v3

• New mempalace/content_hash.py — BloomFilter + ContentHashDB classes
• Modified mempalace/miner.py — integrated ContentHashDB into process_file() and mine()
• Modified mempalace/convo_miner.py — integrated ContentHashDB into mine_convos()
• New tests/test_hashdb.py — 12 tests (all passing)

git-miner

• New mempalace/git_miner.py — git mining module (334 lines)
• Modified mempalace/cli.py — added git mode, --branch argument
• New tests/test_git_miner.py — 17 tests (all passing)

Usage

# Content hash dedup (automatic in mine/convos modes)
mempalace mine /path/to/project
mempalace mine /path/to/convos --mode convos

# Git miner
mempalace mine /path/to/repo --mode git
mempalace mine /path/to/repo --mode git --branch main --branch feature

Test Results

• 29 new tests passing
• All imports verified
• Lint checks passed

[gemini-code-assist]

Code Review

This pull request introduces a git mining mode and content-based duplicate detection using a Bloom filter and SQLite. Feedback identifies memory concerns when hashing large files, logic errors in the file-skipping mechanism within miner.py and convo_miner.py, and inefficient storage of the Bloom filter. Additionally, it is recommended to chunk large git commit content to ensure better search performance and quality.