feat: define repositories datasource [CM-884] (#3758)

Author: mbani01

services/libs/tinybird/datasources/repositories.datasource

@@ -0,0 +1,37 @@
+DESCRIPTION >
+    - `repositories` contains repository definitions linked to projects and integrations.
+    - Replicated from Postgres - defines repository URLs and their associations with segments, integrations, and insights projects.
+    - `id` is the primary key identifier for the repository record.
+    - `url` is the full URL of the repository (e.g., GitHub, GitLab repository URL).
+    - `segmentId` links to the segment this repository belongs to.
+    - `gitIntegrationId` references the git integration used for this repository.
+    - `sourceIntegrationId` references the source integration for this repository.
+    - `insightsProjectId` links to the insights project this repository is associated with.
+    - `archived` indicates whether the repository has been archived.
+    - `forkedFrom` contains the URL of the parent repository if this is a fork (empty string if not a fork).
+    - `excluded` indicates whether the repository is excluded from processing.
+    - `createdAt` and `updatedAt` are standard timestamp fields for record lifecycle tracking.
+    - `deletedAt` is set when the repository is soft-deleted.
+    - `lastArchivedCheckAt` is the timestamp of the last check for repository archived status.
+
+TAGS "Repositories"
+
+SCHEMA >
+    `id` String `json:$.record.id`,
+    `url` String `json:$.record.url`,
+    `segmentId` String `json:$.record.segmentId`,
+    `gitIntegrationId` String `json:$.record.gitIntegrationId`,
+    `sourceIntegrationId` String `json:$.record.sourceIntegrationId`,
+    `insightsProjectId` String `json:$.record.insightsProjectId`,
+    `archived` Bool `json:$.record.archived` DEFAULT false,
+    `forkedFrom` String `json:$.record.forkedFrom` DEFAULT '',
+    `excluded` Bool `json:$.record.excluded` DEFAULT false,
+    `createdAt` DateTime64(3) `json:$.record.createdAt`,
+    `updatedAt` DateTime64(3) `json:$.record.updatedAt`,
+    `deletedAt` Nullable(DateTime64(3)) `json:$.record.deletedAt`,
+    `lastArchivedCheckAt` Nullable(DateTime64(3)) `json:$.record.lastArchivedCheckAt`
+
+ENGINE ReplacingMergeTree
+ENGINE_PARTITION_KEY toYear(createdAt)
+ENGINE_SORTING_KEY url
+ENGINE_VER updatedAt