docs: make the getting started guide work without a model provider API key (#2283)

docs: publish v2.2 as latest (#2111)

docs: publish v2.2 as latest (#2111)

docs(telemetry): the Data Collected list omitted the host hardware attributes crates/telemetry/src/anonymous.rs::resource builds the telemetry resource with five attributes beyond service.name/name: service.version, service.instance.id, spicepod.id, host.cpu.count, host.gpu.count and host.memory.bytes. The page — whose purpose is to enumerate what leaves the host — listed only the first three. The hardware attributes arrived in spiceai/spiceai#8483, first released v1.11.0, so they are added to v1.11.x and later. The instance-id formula also lost a separator: since spiceai/spiceai#9321 (first released v2.0.0) the hash is SHA256(hostname + ":" + spicepod_name), not the concatenation the page describes. Corrected for v2.0.x and later; v1.11.x and older document their own releases correctly. Both source links pointed at blob/trunk with a line anchor, so every snapshot linked today's code at a line that has since moved — L65 of anonymous.rs is now a blank line inside resource(), and L32 of lib.rs is a histogram-bucket comment rather than the metric definitions. Each doc set now links its own release tag (vNext links the reviewed trunk SHA), the identifier link spans the whole resource() function at that ref, and the metrics link drops the stale line anchor.