bump to 0.9.8; add padded-canary build (app_version_padding_tests)

Canary re-proven on this base: reconstruct-from-components trips the
fixture checks; an unpadded fixture trips the non-vacuity assertion.
De-literalizes stale version examples in comments.

src/vst/vst_entry.cpp

@@ -66,8 +66,9 @@ BEGIN_FACTORY(reasampler::vst::kVendorName, reasampler::vst::kVendorUrl,
 // as literals. DEF_CLASS2 expands inside GetPluginFactory() and PClassInfo2's constructor
 // copies the char* into its own fixed buffer at that runtime call, so .c_str() on the
 // accessors' static-storage strings is valid (no dangling — the refs outlive the copy).
-// vstPluginName(): "ReaSampler 9000" / "ReaSampler 9000 beta". appVersion(): "0.9.01" /
-// "0.9.01-beta" (the -beta render V4 already yields on beta).
+// vstPluginName(): "ReaSampler 9000" / "ReaSampler 9000 beta" (live literals in
+// app_version.cpp). appVersion(): the configured version string / that string plus
+// "-beta" (the -beta render V4 already yields on beta).
 DEF_CLASS2(INLINE_UID(REASAMPLER_ACTIVE_UID_1, REASAMPLER_ACTIVE_UID_2,
                       REASAMPLER_ACTIVE_UID_3, REASAMPLER_ACTIVE_UID_4),
            Steinberg::PClassInfo::kManyInstances,       // cardinality