dangernoodle-io / breadboard / 28416951377

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feat(bbtool): ota-serve test OTA server (TLS + provider-pluggable + github/fastly redirect) (#606)

- add ota_server.py: discovers firmware .bin files by parsing esp_app_desc_t magic (0xABCD5432); builds board→(path,version) map; OtaTestServer embeddable handle with context manager support (start/stop/close, releases_url/port/cert_path/fingerprint properties)
- provider abstraction: GitHubProvider with manifest/asset-route/cdn-route topology; PROVIDERS dict for future plugins; head_status=403 on CDN HEAD
- redirect flow: asset route → 302 to cdn route; cdn HEAD → 403 by default (forces esp_https_ota Range-GET fallback); cdn GET → 206 with Content-Range; Accept-Ranges: bytes
- tls: auto-generate self-signed cert+key via openssl subprocess with SAN for advertise-host; cache in ~/.bb/ota-serve/; print sha-256 fingerprint; --cert/--key for BYO certs; --http for plain mode
- tag logic: bump patch of highest discovered version by default (guarantees update trigger); --tag override; --no-bump serves real version; dev* builds treated as 0.0.0
- add ota_serve.py command: --dir, --board, --host, --port, --advertise-host, --provider, --manifest-path, --tag, --no-bump, --cert, --key, --http, --no-redirect, --head-ok
- print releases_url, cert fingerprint, curl --cacert examples on startup
- 26 tests: app-desc parse (multiple offsets), discovery, tag logic, manifest shape, redirect/head/range hops, no-redirect mode, context-manager lifecycle, tls end-to-end


Claude-Session: https://claude.ai/code/session_01Jrcvzkf2QwYcDhe4dJjVKq

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

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