v0.8.0

Added

• Local SQLite memory backend — cog init now offers Local (SQLite) vs Hosted (trycog.ai) as the memory backend
• Local memory tools: learn, recall, associate, deprecate, refactor, update, connectivity, and more — all backed by a local .cog/brain.db
• mem:info and mem:upgrade CLI commands
• SQLite wrapper module and embedded SQLite 3.47.2
• Debug log now writes diagnostic header (version, OS, arch, zig version, command line) on each invocation
• Signal handlers capture SIGILL/SIGSEGV/SIGBUS/SIGABRT crashes with stack traces to .cog/cog.log
• Containerfile for Alpine-based dev container with PostgreSQL, Elixir, Zig, and swap support

Changed

• Debug log truncates on each command invocation instead of appending
• Brain config uses flat string format (e.g. "file:.cog/brain.db") instead of nested object
• README clarifies memory benchmarks are for the hosted brain

Fixed

• Memory leak in toolConnectivity BFS visited map
• Release workflow includes changelog body in GitHub releases