fix(compiler): enforce source and IR acceptance parity

[AetherAI3]

Summary

• reject source programs that would emit unloadable empty IR nodes or empty risk limits
• reject empty/repeated agent role bodies instead of silently overwriting roles
• validate v1 parameter scalar types and deterministic numeric domains
• bound integer literals to 640 significant digits before conversion and reject nonfinite float literals across all source numeric paths
• publish package 1.0.7; Nano IR remains 0.1.0/1.0.0

Evidence

• independent adversarial review found and verified fixes for ambient integer-guard leakage and float overflow to Infinity
• focused merge-entry: 600 passed
• full: 979 passed, 2 skipped
• contribution checker: 53 ready
• all 59 shipped/example sources and paired IR documents compile/load
• external wheel 1.0.7, catalog 53 with zero diagnostics, protocol constants unchanged
• receipt golden changes are identity.nanoVersion 1.0.6 to 1.0.7 only

No serialized shape change, ambient network/clock/randomness, broker execution, or performance claim.