feat(tailordb): warning tier and migration script subcommand

.changeset/preserve-removed-fields-in-pre-migration.md

@@ -0,0 +1,9 @@
+---
+"@tailor-platform/sdk": minor
+---
+
+Improve `tailordb migration` handling of data-loss-possible changes:
+
+- Removed fields (`field_removed`) and removed types (`type_removed`) are now reported as **warnings** during `tailordb migration generate`, not silent changes. They are no longer dropped before `migrate.ts` runs: the field/type stays available during the Pre-migration phase so that scripts can read it (e.g. `innerJoin` through a foreign key that is being dropped in the same migration), then the physical drop happens in the Post-migration phase.
+- Add `tailordb migration script <number>` subcommand to add a `migrate.ts` (and `db.ts`) template to an existing migration directory. Useful for warning-tier changes where you want a custom data migration even though one was not generated automatically.
+- `migrate.ts` is now executed whenever the file exists on disk for a pending migration, regardless of whether the diff originally required a script. Breaking changes still hard-require a script as before.

packages/sdk/docs/cli-reference.md

@@ -114,6 +114,7 @@ Commands for managing TailorDB tables, data, and schema migrations.
 | ---------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------- |
 | [tailordb truncate](./cli/tailordb.md#tailordb-truncate)                     | Truncate (delete all records from) TailorDB tables.                                                                       |
 | [tailordb migration generate](./cli/tailordb.md#tailordb-migration-generate) | Generate migration files by detecting schema differences between current local types and the previous migration snapshot. |
+| [tailordb migration script](./cli/tailordb.md#tailordb-migration-script)     | Add a migration script (migrate.ts) template to an existing migration directory.                                          |
 | [tailordb migration set](./cli/tailordb.md#tailordb-migration-set)           | Set migration checkpoint to a specific number.                                                                            |
 | [tailordb migration status](./cli/tailordb.md#tailordb-migration-status)     | Show the current migration status for TailorDB namespaces, including applied and pending migrations.                      |
 | [tailordb erd export](./cli/tailordb.md#tailordb-erd-export)                 | Export Liam ERD dist from applied TailorDB schema.                                                                        |

packages/sdk/docs/cli/tailordb.md

@@ -154,6 +154,7 @@ tailor-sdk tailordb migration [command]
 | Command                                                       | Description                                                                                                               |
 | ------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------- |
 | [`tailordb migration generate`](#tailordb-migration-generate) | Generate migration files by detecting schema differences between current local types and the previous migration snapshot. |
+| [`tailordb migration script`](#tailordb-migration-script)     | Add a migration script (migrate.ts) template to an existing migration directory.                                          |
 | [`tailordb migration set`](#tailordb-migration-set)           | Set migration checkpoint to a specific number.                                                                            |
 | [`tailordb migration status`](#tailordb-migration-status)     | Show the current migration status for TailorDB namespaces, including applied and pending migrations.                      |
 
@@ -204,6 +205,55 @@ tailor-sdk tailordb migration generate [options]
 See [Global Options](../cli-reference.md#global-options) for options available to all commands.
 
 <!-- politty:command:tailordb migration generate:global-options-link:end -->
+<!-- politty:command:tailordb migration script:heading:start -->
+
+#### tailordb migration script
+
+<!-- politty:command:tailordb migration script:heading:end -->
+
+<!-- politty:command:tailordb migration script:description:start -->
+
+Add a migration script (migrate.ts) template to an existing migration directory.
+
+<!-- politty:command:tailordb migration script:description:end -->
+
+<!-- politty:command:tailordb migration script:usage:start -->
+
+**Usage**
+
+```
+tailor-sdk tailordb migration script [options] <number>
+```
+
+<!-- politty:command:tailordb migration script:usage:end -->
+
+<!-- politty:command:tailordb migration script:arguments:start -->
+
+**Arguments**
+
+| Argument | Description                                           | Required |
+| -------- | ----------------------------------------------------- | -------- |
+| `number` | Migration number to add a script to (e.g., 0001 or 1) | Yes      |
+
+<!-- politty:command:tailordb migration script:arguments:end -->
+
+<!-- politty:command:tailordb migration script:options:start -->
+
+**Options**
+
+| Option                    | Alias | Description                                                       | Required | Default              | Env                               |
+| ------------------------- | ----- | ----------------------------------------------------------------- | -------- | -------------------- | --------------------------------- |
+| `--config <CONFIG>`       | `-c`  | Path to SDK config file                                           | No       | `"tailor.config.ts"` | `TAILOR_PLATFORM_SDK_CONFIG_PATH` |
+| `--namespace <NAMESPACE>` | `-n`  | Target TailorDB namespace (required if multiple namespaces exist) | No       | -                    | -                                 |
+
+<!-- politty:command:tailordb migration script:options:end -->
+
+<!-- politty:command:tailordb migration script:global-options-link:start -->
+
+See [Global Options](../cli-reference.md#global-options) for options available to all commands.
+
+<!-- politty:command:tailordb migration script:global-options-link:end -->
+
 <!-- politty:command:tailordb migration set:heading:start -->
 
 #### tailordb migration set