Foundations: Emmy Noether (symmetry ↔ conservation laws) + bidirectional strengthening of Rotation

[jonassiebler]

Summary

Second theme-branch of the physics-anchor wave: Symmetry and Conservation Laws.

What lands

• New Foundations page: /foundations/noether-symmetry-and-conservation
  • Noether’s 1918 theorems (continuous symmetries ↔ conserved quantities)
  • Angular momentum as the conserved quantity associated with rotational invariance
  • Reading protocol respected (Noether first → Inspiration → IE additions)
• Foundations index updated (chronological placement after Nietzsche)
• Bidirectional strengthening of the Rotation Core Concept page:
  • /framework/rotation now explicitly anchors the conserved character of coherent spin / angular-momentum analogue to Noether’s theorem

Explicit non-claims

• Isomorphy work only. The concrete symmetries of identity dynamics remain under construction; the theorem supplies the structural warrant that conserved quantities are not arbitrary.
• No em-dashes; inline tags kept on one line with surrounding spaces.

Relation to other open work

• Complements Einstein (geometric layer) and the force/binding Foundations.
• Highest-leverage single addition for the dynamical stability of the Stem (Rotation).

No merge until explicit approval.

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