feat(sub12b): fp.job.step.move + fp.job.step.move.input.value

Chain-of-custody log: one row per Move Parts / Move Rack commit.
FP/MOVE/YYYY/NNNN sequence (5-digit). Carries from/to step + tank,
transfer type, qty, location, photo, rack, operator, datetime.

Child model captures recorded transition-input values (Sub 12a's
fp.step.template.transition.input snapshots → fp.job.step.move.
input.value rows). Each row carries 5 typed value columns; the
controller (Task 8) picks the right one based on input_type.

Operators get read+write+create — they generate moves at runtime —
but no unlink. Manager-only deletes for audit safety.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating/data/fp_sequence_data.xml

@@ -22,5 +22,13 @@
         <field name="company_id" eval="False"/>
     </record>
 
+    <!-- Sub 12b — Move Parts / Move Rack chain-of-custody log -->
+    <record id="seq_fp_job_step_move" model="ir.sequence">
+        <field name="name">FP — Move Log</field>
+        <field name="code">fp.job.step.move</field>
+        <field name="prefix">FP/MOVE/%(year)s/</field>
+        <field name="padding">5</field>
+        <field name="company_id" eval="False"/>
+    </record>
 
 </odoo>

fusion_plating/fusion_plating/models/__init__.py

@@ -40,3 +40,4 @@ from . import fp_step_template_transition_input
 
 # Sub 12b — Rack-aware moves + persistent labor reconciliation
 from . import fp_rack_tag
+from . import fp_job_step_move

fusion_plating/fusion_plating/models/fp_job_step_move.py

@@ -0,0 +1,104 @@
+# -*- coding: utf-8 -*-
+# Copyright 2026 Nexa Systems Inc.
+# License OPL-1 (Odoo Proprietary License v1.0)
+# Part of the Fusion Plating product family.
+
+from odoo import api, fields, models
+
+
+class FpJobStepMove(models.Model):
+    """Chain-of-custody log — one row per part-batch move.
+
+    Sub 12b: every Move Parts / Move Rack click commits one (or, for
+    rack moves, one-per-batch atomic) row here. Sub 12c walks these in
+    chronological order to render the customer CoC PDF.
+    """
+    _name = 'fp.job.step.move'
+    _description = 'Fusion Plating — Job Step Move (Chain-of-Custody)'
+    _inherit = ['mail.thread']
+    _order = 'move_datetime desc, id desc'
+
+    name = fields.Char(
+        string='Move Reference',
+        default=lambda self: self.env['ir.sequence'].next_by_code(
+            'fp.job.step.move') or '/',
+        readonly=True, copy=False,
+    )
+    job_id = fields.Many2one('fp.job', string='Job',
+        required=True, ondelete='cascade', index=True)
+    from_step_id = fields.Many2one('fp.job.step', string='From Step',
+        ondelete='set null', index=True)
+    to_step_id = fields.Many2one('fp.job.step', string='To Step',
+        ondelete='set null', index=True, required=True)
+    from_tank_id = fields.Many2one('fusion.plating.tank',
+        related='from_step_id.tank_id', store=True)
+    to_tank_id = fields.Many2one('fusion.plating.tank', string='To Tank',
+        ondelete='set null')
+
+    transfer_type = fields.Selection([
+        ('step', 'Step'),
+        ('hold', 'Hold'),
+        ('scrap', 'Scrap'),
+        ('rework', 'Rework'),
+        ('split', 'Split'),
+        ('return', 'Return'),
+    ], string='Transfer Type', default='step', required=True)
+
+    qty_moved = fields.Integer(string='Qty Moved', required=True)
+    qty_available_at_move = fields.Integer(string='Qty Available')
+
+    to_location = fields.Selection([
+        ('global', 'Global'),
+        ('quarantine', 'Quarantine'),
+        ('staging_a', 'Staging A'),
+        ('staging_b', 'Staging B'),
+        ('shipping_dock', 'Shipping Dock'),
+        ('scrap_bin', 'Scrap Bin'),
+    ], string='To Location', default='global')
+
+    photo_evidence_id = fields.Many2one('ir.attachment',
+        string='Photo Evidence', ondelete='set null')
+    customer_wo_count = fields.Integer(string='# Customer WOs')
+
+    rack_id = fields.Many2one('fusion.plating.rack',
+        string='Rack', ondelete='set null', index=True)
+    unrack_after_move = fields.Boolean(string='Unrack After Move')
+
+    moved_by_user_id = fields.Many2one('res.users', string='Moved By',
+        default=lambda self: self.env.user, required=True)
+    move_datetime = fields.Datetime(string='Move Time',
+        default=fields.Datetime.now, required=True, index=True)
+
+    transition_input_value_ids = fields.One2many(
+        'fp.job.step.move.input.value', 'move_id',
+        string='Transition Input Values',
+    )
+
+
+class FpJobStepMoveInputValue(models.Model):
+    """Captured value for one transition-input prompt.
+
+    Each row = one author-defined prompt × one move. Snapshot of what
+    the operator typed at move-time. Used by Sub 12c CoC report.
+    """
+    _name = 'fp.job.step.move.input.value'
+    _description = 'Fusion Plating — Captured Transition Input Value'
+    _order = 'move_id, id'
+
+    move_id = fields.Many2one('fp.job.step.move', string='Move',
+        required=True, ondelete='cascade', index=True)
+    template_input_id = fields.Many2one(
+        'fp.step.template.transition.input',
+        string='Template Input', ondelete='set null',
+        help='What was originally asked (template-level reference).')
+    node_input_id = fields.Many2one(
+        'fusion.plating.process.node.input',
+        string='Node Input', ondelete='set null',
+        help='Snapshot of the authored prompt at job-creation time.')
+
+    value_text = fields.Char(string='Text Value')
+    value_number = fields.Float(string='Number Value')
+    value_boolean = fields.Boolean(string='Yes/No Value')
+    value_date = fields.Datetime(string='Date Value')
+    value_attachment_id = fields.Many2one('ir.attachment',
+        string='Attachment Value', ondelete='set null')

fusion_plating/fusion_plating/security/ir.model.access.csv

@@ -73,3 +73,9 @@ access_fp_step_template_transition_input_manager,fp.step.template.transition.inp
 access_fp_rack_tag_operator,fp.rack.tag.operator,model_fp_rack_tag,group_fusion_plating_operator,1,0,0,0
 access_fp_rack_tag_supervisor,fp.rack.tag.supervisor,model_fp_rack_tag,group_fusion_plating_supervisor,1,1,1,1
 access_fp_rack_tag_manager,fp.rack.tag.manager,model_fp_rack_tag,group_fusion_plating_manager,1,1,1,1
+access_fp_job_step_move_operator,fp.job.step.move.operator,model_fp_job_step_move,group_fusion_plating_operator,1,1,1,0
+access_fp_job_step_move_supervisor,fp.job.step.move.supervisor,model_fp_job_step_move,group_fusion_plating_supervisor,1,1,1,0
+access_fp_job_step_move_manager,fp.job.step.move.manager,model_fp_job_step_move,group_fusion_plating_manager,1,1,1,1
+access_fp_job_step_move_input_value_operator,fp.job.step.move.input.value.operator,model_fp_job_step_move_input_value,group_fusion_plating_operator,1,1,1,0
+access_fp_job_step_move_input_value_supervisor,fp.job.step.move.input.value.supervisor,model_fp_job_step_move_input_value,group_fusion_plating_supervisor,1,1,1,0
+access_fp_job_step_move_input_value_manager,fp.job.step.move.input.value.manager,model_fp_job_step_move_input_value,group_fusion_plating_manager,1,1,1,1