feat(mcp): add list_tags and get_tag_info MCP tools#12
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Adds list_tags and get_tag_info MCP tools in a new superset/mcp_service/tag/ domain, following the existing database/dataset/dashboard patterns. Registers both tools in app.py and covers them with unit tests. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…upport
TagFilter documents 'ct' as a valid operator but ColumnOperatorEnum was
missing it, causing ValidationError when constructing TagFilter with opr="ct".
Added ct = "ct" with ilike("%val%") mapping, updated TYPE_OPERATOR_MAP for
string columns, and updated base_dao_test to cover the new operator.
…tils Remove duplicate _humanize_timestamp from 5 schema files (chart, dashboard, database, dataset, tag) and expose a single canonical humanize_timestamp in utils/response_utils. Use the timezone-aware implementation throughout.
…y interface Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Tag inherits AuditMixinNullable which provides both created_on and changed_on. The schema included changed_on but omitted created_on, leaving it inconsistent with all sibling schemas (chart, dashboard, dataset, database) which expose both timestamps. Adds created_on/created_on_humanized to TagInfo, serialize_tag_object, ALL_TAG_COLUMNS, SORTABLE_TAG_COLUMNS, and the list_tags docstring.
…tency All analogous item_serializer wrappers across chart, dashboard, dataset, and database list tools use `cols` (not `_cols`) as the parameter name. The underscore prefix is not needed — ruff ARG rules are not enabled, so unused function parameters are not flagged.
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Mirror of apache/superset#40349 by @aminghadersohi