Sync only the declaring module before a run; skip git-ignored paths

`fluksio run` walked the working directory and imported every module in
it, which ran a research repository's analysis scripts before the run was
submitted. A flow's origin now records the file and module name that
declared it, and run/sweep import just that, under the same name so the
generated node bodies do not change. A flow with no record still walks,
now skipping what .gitignore covers.

Every code-defined flow reports `flow` changed once on its next sync,
since the origin gained two fields.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QgG6TJw5qBZzaLghQSRVrq

frontend/src/client/schemas.gen.ts

@@ -1159,6 +1159,16 @@ export const FlowOriginSchema = {
             type: 'boolean',
             title: 'Dirty',
             default: false
+        },
+        declared_in: {
+            type: 'string',
+            title: 'Declared In',
+            default: ''
+        },
+        module: {
+            type: 'string',
+            title: 'Module',
+            default: ''
         }
     },
     type: 'object',

frontend/src/client/types.gen.ts

@@ -364,6 +364,8 @@ export type FlowOrigin = {
     repo?: string;
     commit?: string;
     dirty?: boolean;
+    declared_in?: string;
+    module?: string;
 };
 
 export type FlowRollup = {