fix(server): move archiver_demo.db fixture into the crate so CI can find it

db::tests::archiver_demo_db_parses_and_yields_expected_record_count read
<crate>/../demo/archiver_demo.db, but `.gitignore:33` excludes the whole
demo/ directory, so no file under it has ever been tracked. The test could
only pass where the file happened to exist on disk and failed on every
fresh checkout:

  DbParseError { path: ".../spvirit-server/../demo/archiver_demo.db",
                 message: "No such file or directory (os error 2)" }

Follow the convention of the sibling test in the same module: keep the
fixture inside the crate at examples/archiver_demo.db, alongside the
already-tracked example.db, and read it from CARGO_MANIFEST_DIR/examples.

This also decouples the assertion from demo/, whose copy is rewritten by
archiver_demo_gen.py while the demo runs; the tracked snapshot keeps the
14-record count stable.

Verified by running the test with demo/ renamed away, reproducing the CI
condition. spvirit-server lib suite: 186 passed, 0 failed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: MatSTFCInGit

spvirit-server/examples/archiver_demo.db

@@ -0,0 +1,113 @@
+# Archiver Appliance demo database - one PV per record type spserver can load.
+# Generated by archiver_demo_gen.py at 2026-07-16 19:47:14 - DO NOT EDIT while the generator runs.
+
+# ---- analog inputs -------------------------------------------------------
+record(ai, "DEMO:AI:SINE") {
+    field(DESC, "5 V sine, 30 s period, cycles alarm limits")
+    field(VAL, "0.9380")
+    field(EGU, "V")
+    field(PREC, "3")
+    field(LOPR, "-10")
+    field(HOPR, "10")
+    field(LOW, "-3")
+    field(HIGH, "3")
+    field(LOLO, "-4.5")
+    field(HIHI, "4.5")
+}
+record(ai, "DEMO:AI:RAMP") {
+    field(DESC, "0-100 % sawtooth, 60 s period")
+    field(VAL, "23.50")
+    field(EGU, "%")
+    field(PREC, "1")
+    field(LOPR, "0")
+    field(HOPR, "100")
+}
+record(ai, "DEMO:AI:NOISE") {
+    field(DESC, "Pseudo-noise around 50 degC")
+    field(VAL, "49.365")
+    field(EGU, "degC")
+    field(PREC, "2")
+    field(LOPR, "40")
+    field(HOPR, "60")
+}
+record(ai, "DEMO:AI:FOLLOW") {
+    field(DESC, "Server-side periodic scan copying DEMO:AO:SETPOINT")
+    field(SCAN, "1 second")
+    field(INP, "DEMO:AO:SETPOINT")
+    field(EGU, "A")
+    field(PREC, "3")
+    field(LOPR, "0")
+    field(HOPR, "10")
+}
+
+# ---- analog output (writable via pvput) ----------------------------------
+record(ao, "DEMO:AO:SETPOINT") {
+    field(DESC, "0-10 A triangle, 120 s period, accepts puts")
+    field(VAL, "7.6502")
+    field(EGU, "A")
+    field(PREC, "3")
+    field(LOPR, "0")
+    field(HOPR, "10")
+    field(DRVL, "0")
+    field(DRVH, "10")
+}
+
+# ---- binary ---------------------------------------------------------------
+record(bi, "DEMO:BI:PULSE") {
+    field(DESC, "Square wave, toggles every 5 s")
+    field(VAL, "0")
+    field(ZNAM, "LOW")
+    field(ONAM, "HIGH")
+}
+record(bo, "DEMO:BO:ENABLE") {
+    field(DESC, "Toggles every 17 s, accepts puts")
+    field(VAL, "0")
+    field(ZNAM, "DISABLED")
+    field(ONAM, "ENABLED")
+}
+
+# ---- strings ---------------------------------------------------------------
+record(stringin, "DEMO:STR:CLOCK") {
+    field(DESC, "Wall-clock time string")
+    field(VAL, "2026-07-16 19:47:14")
+}
+record(stringout, "DEMO:STR:MODE") {
+    field(DESC, "Rotating machine mode, accepts puts")
+    field(VAL, "COOLDOWN")
+}
+
+# ---- arrays ----------------------------------------------------------------
+record(waveform, "DEMO:WF:SINE") {
+    field(DESC, "Scrolling sine snapshot, 64 doubles")
+    field(FTVL, "DOUBLE")
+    field(NELM, "64")
+    field(VAL, "-0.977, -0.822, -0.541, -0.178, 0.212, 0.570, 0.841, 0.984, 0.977, 0.822, 0.541, 0.178, -0.212, -0.570, -0.841, -0.984, -0.977, -0.822, -0.541, -0.178, 0.212, 0.570, 0.841, 0.984, 0.977, 0.822, 0.541, 0.178, -0.212, -0.570, -0.841, -0.984, -0.977, -0.822, -0.541, -0.178, 0.212, 0.570, 0.841, 0.984, 0.977, 0.822, 0.541, 0.178, -0.212, -0.570, -0.841, -0.984, -0.977, -0.822, -0.541, -0.178, 0.212, 0.570, 0.841, 0.984, 0.977, 0.822, 0.541, 0.178, -0.212, -0.570, -0.841, -0.984")
+}
+record(waveform, "DEMO:WF:LABELS") {
+    field(DESC, "String waveform with rotating labels")
+    field(FTVL, "STRING")
+    field(NELM, "4")
+    field(VAL, "SLOT0-COOLDOWN, SLOT1-COOLDOWN, SLOT2-COOLDOWN, SLOT3-COOLDOWN")
+}
+record(aai, "DEMO:AAI:COUNTS") {
+    field(DESC, "Counting int32 array, 16 elements")
+    field(FTVL, "LONG")
+    field(NELM, "16")
+    field(VAL, "634, 641, 648, 655, 662, 669, 676, 683, 690, 697, 704, 711, 718, 725, 732, 739")
+}
+record(aao, "DEMO:AAO:GAINS") {
+    field(DESC, "Breathing float32 gains, accepts puts")
+    field(FTVL, "FLOAT")
+    field(NELM, "8")
+    field(VAL, "1.3459, 0.8831, 0.5278, 0.6066, 1.0471, 1.4443, 1.4330, 1.0236")
+}
+record(subArray, "DEMO:SUB:SLICE") {
+    field(DESC, "First 8 samples of DEMO:WF:SINE, rescanned every 1 s")
+    field(SCAN, "1 second")
+    field(INP, "DEMO:WF:SINE")
+    field(FTVL, "DOUBLE")
+    field(INDX, "0")
+    field(NELM, "8")
+    field(MALM, "64")
+    field(VAL, "-0.977, -0.822, -0.541, -0.178, 0.212, 0.570, 0.841, 0.984")
+}

spvirit-server/src/db.rs

@@ -1075,11 +1075,10 @@ mod tests {
     #[test]
     fn archiver_demo_db_parses_and_yields_expected_record_count() {
         let path = std::path::Path::new(env!("CARGO_MANIFEST_DIR"))
-            .join("..")
-            .join("demo")
+            .join("examples")
             .join("archiver_demo.db");
         let recs = load_db_records(path.to_str().expect("utf8 path"), &HashMap::new())
-            .expect("demo/archiver_demo.db must parse");
+            .expect("examples/archiver_demo.db must parse");
         assert_eq!(
             recs.len(),
             14,