Check in versioned docs and remove generate-versions script (#1386) * Check in versioned docs and remove generate-versions script Transition from per-branch versioning to all versions checked in. Generated versioned docs from release branches 1.5 through 1.11. Removed generate-versions.sh and updated .gitignore. * Remove generate-versions script from build workflow Versioned docs are now checked in directly. Remove the script invocation from package.json build, drop the fetch-depth: 0 from CI (no longer needed), and update README to reflect the new process.

docs(s3_vectors): document batch_write_rows, spill_writes, iam_role_source Three parameters in the engine's `PARAMETERS` array (crates/runtime/src/embeddings/index/s3/mod.rs) were never documented: - s3_vectors_batch_write_rows (v1.9+, default 100000 = DEFAULT_BATCH_WRITE_ROWS) - s3_vectors_spill_writes (v1.11+, default false; ignored with a warning when partition_by is set) - s3_vectors_aws_iam_role_source (v2.0+, auto | metadata | env, default auto; bypassed entirely when an access key and secret are set) Each row is added only to the snapshots whose release actually declares the parameter, verified against PARAMETERS at each tag.