v0.1.0-alpha.1

First public alpha. Connecting, browsing, querying and row editing work;
DDL generation and EXPLAIN are not implemented yet (see "Known limitations").
Tested against CockroachDB v24.3 and the latest release.

Added

• Connection and TLS: pooled connections with keepalives and a 10 s connect
  timeout; TLS modes disable, prefer, require, verify-ca (hostname
  mismatch tolerated) and verify-full; custom CA and client certificates
  (PKCS#8, PKCS#1 and SEC1 keys); cockroachdb://, cockroach://,
  postgresql:// and postgres:// connection strings, including
  options=--cluster=... for CockroachDB Cloud. The server version is read
  from version(), other servers are refused with a pointer to the PostgreSQL
  driver, and common connection errors are explained.
• Schema browsing: databases, schemas, tables (comments, row estimates),
  views, columns (canonical types, comments, primary keys, hidden columns
  excluded), indexes (STORING, expression and hash-sharded columns handled),
  composite foreign keys, and SHOW CREATE TABLE DDL.
• Result decoding: exact INT8 (a string beyond 2^53), DECIMAL, JSONB,
  BYTES, dates, times, intervals, UUID, INET, BIT, arrays, enums, spatial
  values, VECTOR, TSVECTOR and TSQUERY.
• Query execution: execute_query and execute_query_batch with
  pagination that understands comments, strings and LIMIT/OFFSET;
  transactions that span several runs of an editor tab (session_id,
  release_session); query cancellation; automatic retry of implicit
  transactions on 40001; the transaction state is read from the server.
  Errors carry the SQLSTATE, DETAIL and HINT. A host display limit never
  changes what a statement writes, and session settings never leak to the next
  tab.
• Row editing: insert_record, update_record and delete_record, with
  type-aware binding, composite and NULL keys, the hidden rowid for tables
  without a primary key, and BEGIN READ WRITE so edits work on read-only
  default connections. A key that would change more than one row is refused,
  an empty key is refused, and editing a vanished row is a conflict.
• BLOBs: fetch_blob_as_data_url, save_blob_to_file, and upload of a
  picked file (BLOB_FILE_REF) within the host's maxBlobSize.
• Plugin settings poolMaxSize, retryMaxAttempts and applicationName.
• .tabularium manifest with CockroachDB metadata, icon, capabilities, data
  types, type mappings and plugin settings.
• CI (tests, clippy, rustfmt, manifest validation, markdownlint, cargo-audit,
  live CockroachDB tests on the oldest LTS line and the latest release),
  release and version-suggestion workflows, and the architecture documents in
  docs/architecture.

Known limitations

Tracked in #16:

• EXPLAIN is not implemented; the explain button returns "Method not found".
• DDL helpers (get_create_table_sql, get_add_column_sql,
  get_alter_column_sql, get_create_index_sql,
  get_create_foreign_key_sql, drop_index, drop_foreign_key) and view
  mutations are not implemented. The manifest advertises them, so the UI
  offers them and they fail. Running DDL as SQL in the editor works.
• Materialized views, sequences, routines, triggers, multi-region metadata and
  the schema snapshot (ER diagram) are not provided yet.
• Not exercised against a real CockroachDB Cloud cluster, nor query
  cancellation behind a load balancer; a real 40001 retry of an implicit
  statement could not be provoked on the tested releases.