fix(daemon): emit version on uffsd --version

[githubrobbi]

Why

just use's install-time --version probe shows uffsd returning empty:

Installed versions:
  uffsmcp.exe  uffsmcp 0.5.74
  uffs.exe     uffs 0.5.74
  uffsd.exe                     ← empty
  uffs_mft.exe uffs_mft 0.5.74

Root cause: uffsd's clap #[command(...)] attribute was missing version, so clap doesn't wire a --version handler at all and the binary exits silently.

Peer binaries already pull CARGO_PKG_VERSION via clap's auto-version:

• uffs-mcp/src/main.rs → #[command(name = "uffsmcp", version, about)]
• uffs-mft/src/cli.rs → #[command(author, version, about, ...)]
• uffs-cli/src/args.rs → custom print_version() handler

What

Daemon fix (crates/uffs-daemon/src/main.rs):

• Add version to #[command(...)].
• Align clap name from "uffs-daemon" → "uffsd", matching the actual [[bin]] name = "uffsd" in crates/uffs-daemon/Cargo.toml (and the binary path users invoke).

Verified locally:

$ ./target/debug/uffsd --version
uffsd 0.5.74
$ ./target/debug/uffsd --help | head -1
UFFS background search daemon

Bonus dev tooling (just/build.just) — fixes a recurring friction in the daily-driver oneliner:

git pull; just use
    ↓
error: Your local changes to the following files would be overwritten
       by merge: Cargo.lock

cargo build rewrites Cargo.lock whenever a transitive dep re-resolves (mtime drift, polars git pin movement, etc.); after a just ship upstream the lockfile has moved, so a plain git pull aborts.

• just sync — git fetch origin main && git reset --hard FETCH_HEAD, guarded against running on any branch other than main so feature branches with real WIP cannot be wiped by accident. Prints what's being discarded. Both [unix] (bash) and [windows] (PowerShell) variants, matching the existing use / use-local split.
• just refresh — refresh: sync use. Drop-in replacement for the git pull; just use leg of the daily-driver oneliner.

New oneliner:

clear; Remove-Item -Recurse -Force "$env:LOCALAPPDATA\uffs\cache" -ErrorAction SilentlyContinue; `
Remove-Item -Recurse -Force "$env:TEMP\uffs_index_cache" -ErrorAction SilentlyContinue; `
~\bin\uffs.exe mcp kill; ~\bin\uffs.exe daemon kill; `
just refresh; `
~\bin\uffs.exe daemon start; ~\bin\uffs.exe mcp start; ~\bin\uffs.exe status

Self-test on this branch (which is not main) confirms the safety guard:

$ just sync
❌ just sync only runs on main (current: fix/uffsd-version-and-sync-recipes)
   Use 'git pull --rebase' (or commit the WIP first) on feature branches.

Scope

Single PR, type fix because the version-flag is the user-visible behavioral defect driving the patch-bump release. The recipe additions are dev-tooling-only and have no effect on shipped binaries.

Tests / verification

• cargo build -p uffs-daemon — clean
• ./target/debug/uffsd --version / --help — both produce the expected output
• just lint-fast — green (file-size, fmt-check, lint-prod, lint-tests, lint-ci, typos, reuse)
• lint-pre-push — green across all 13 gates including tests, rustdoc, doc-tests, check-windows, smoke
• just --summary | grep shows sync, refresh, use, use-local all parsed
• just sync on this branch correctly refuses with the helpful error

Follow-up

After this lands I'll cut v0.5.75 via just ship so ~/bin/uffsd.exe --version actually shows uffsd 0.5.75 next time you just refresh.