Initial version of collation migration scripts.

docs/VERIFY.md

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+# Verify – Compare Source and Target
+
+The script `scripts/compare_source_target.sql` compares **structure and high-level consistency** between two databases without comparing row contents.
+
+## What is compared
+
+1. **Rowcounts per table**
+2. **Columns**: datatype, length, nullable, collation
+3. **Programmable objects**: views, stored procedures, functions (hash of definition)
+4. **Triggers** (hash of definition)
+5. **Users/Roles**: principals existence + role memberships
+
+## How to run
+
+1. Open `scripts/compare_source_target.sql` in SSMS
+2. Set:
+   - `@SourceDb` (default: `sysdb_UTF8`)
+   - `@TargetDb` (default: `sysdb_utf8_jr`)
+3. Execute.
+
+## Output style (quick to read)
+
+### Live messages (SSMS Messages tab)
+
+You get a human-readable summary per step, e.g.:
+
+- `ROWCOUNTS | SourceTables=... TargetTables=... TablesWithRowDiff=...`
+- `COLUMNS | ColumnDiffs=...`
+- `MODULES | Differences=...`
+- `TRIGGERS | Differences=...`
+- `PRINCIPALS | Differences=...`
+- `ROLEMEMBERS | Differences=...`
+
+At the end:
+
+`COMPARE_DONE | RowDiffTables=... | ColumnDiffs=... | ...`
+
+### Result sets (details)
+
+If differences exist, result sets are shown for:
+
+- Rowcount diffs
+- Column diffs
+- Module diffs
+- Trigger diffs
+- Principal diffs
+- Role membership diffs
+
+If a section has **no differences**, you’ll see an `..._OK` message and no detail list.