Gortex v1.2.4

• Add on-demand dashboard start, stop, and status commands.
• Prevent ignored-file scan hangs and reduce census allocations.
• Preserve incomplete semantic enrichment for safe retries.
• Honor cancellation during daemon handshakes and semantic lock waits.
• Fix profiling listener shutdown and add concurrency regressions.
• Include Linux amd64 archives, Debian packages, and SHA-256 checksums.