* chore: bump driver submodule requires, drop root replace directives

The db/driver submodules now have real tags under the corrected go-libfossil module path (v0.3.0 for modernc and ncruces). Root no longer needs to resolve them from local directories via replace.

go mod tidy also cleared the stale old-path (danmestas/libfossil) lines the earlier replace bridge left behind in go.sum.

* chore: drop submodule replace directives, pin root require to a pseudo-version

The three submodules required the root module (which they import directly or transitively) but no root tag has ever existed under the corrected go-libfossil path -- every prior tag (v0.1.0 through v0.6.3) still declares the old danmestas/libfossil path in its own go.mod, so pinning to any of them would reproduce the exact declares-as-X-required-as-Y failure the module rename was fixing.

Pinned each submodule's require on root to a pseudo-version of the just-pushed go.mod cleanup commit (48111c1) instead of a tag -- the standard resolution for this bootstrapping case. This is a stopgap: once the next root release tag exists, these can be bumped to point at it directly instead of the pseudo-version, but there's no functional difference in the meantime.

go mod tidy on each submodule also dropped now-unneeded indirect requires (modernc/ncruces don't actually import each other; the requires existed only to satisfy the local replace directives) and cleared the stale old-path go.sum lines.

All four go.mod files are now free of replace directives. check-in: 2de18e7747 user: [email protected] tags: trunk