Steve Yegge 79b7a48a73 Add database fingerprinting and validation (bd-166) ...

- Add fingerprint.go with robust URL canonicalization
  - Handles git@, ssh://, https://, http://, file://, and local paths
  - Normalizes URLs to produce consistent repo_id across formats
  - Clone ID uses git repo root for stability

- Update init.go to store repo_id and clone_id metadata
  - repo_id: SHA256 hash of canonical git remote URL
  - clone_id: SHA256 hash of hostname + repo root path

- Add daemon validation to prevent database mismatches
  - Validates repo_id on daemon start
  - Fails on legacy databases (requires explicit migration)
  - Clear error messages with actionable solutions

- Add migrate --update-repo-id command
  - Updates repo_id after remote URL changes
  - Confirmation prompt (can bypass with --yes)
  - Supports --dry-run

Prevents accidental database mixing across repos and provides
migration path for remote URL changes or bd upgrades.

Closes bd-166

Amp-Thread-ID: https://ampcode.com/threads/T-a9d9dab1-5808-4f62-93ea-75a16cca978b
Co-authored-by: Amp <amp@ampcode.com>

2025-10-26 21:15:57 -07:00

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