Integrate BACKBEAT SDK and resolve KACHING license validation

Major integrations and fixes:
- Added BACKBEAT SDK integration for P2P operation timing
- Implemented beat-aware status tracking for distributed operations
- Added Docker secrets support for secure license management
- Resolved KACHING license validation via HTTPS/TLS
- Updated docker-compose configuration for clean stack deployment
- Disabled rollback policies to prevent deployment failures
- Added license credential storage (CHORUS-DEV-MULTI-001)

Technical improvements:
- BACKBEAT P2P operation tracking with phase management
- Enhanced configuration system with file-based secrets
- Improved error handling for license validation
- Clean separation of KACHING and CHORUS deployment stacks

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/github.com/decred/dcrd/dcrec/secp256k1/v4/doc.go

@@ -0,0 +1,59 @@
+// Copyright (c) 2013-2014 The btcsuite developers
+// Copyright (c) 2015-2022 The Decred developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+/*
+Package secp256k1 implements optimized secp256k1 elliptic curve operations in
+pure Go.
+
+This package provides an optimized pure Go implementation of elliptic curve
+cryptography operations over the secp256k1 curve as well as data structures and
+functions for working with public and private secp256k1 keys.  See
+https://www.secg.org/sec2-v2.pdf for details on the standard.
+
+In addition, sub packages are provided to produce, verify, parse, and serialize
+ECDSA signatures and EC-Schnorr-DCRv0 (a custom Schnorr-based signature scheme
+specific to Decred) signatures.  See the README.md files in the relevant sub
+packages for more details about those aspects.
+
+An overview of the features provided by this package are as follows:
+
+  - Private key generation, serialization, and parsing
+  - Public key generation, serialization and parsing per ANSI X9.62-1998
+  - Parses uncompressed, compressed, and hybrid public keys
+  - Serializes uncompressed and compressed public keys
+  - Specialized types for performing optimized and constant time field operations
+  - FieldVal type for working modulo the secp256k1 field prime
+  - ModNScalar type for working modulo the secp256k1 group order
+  - Elliptic curve operations in Jacobian projective coordinates
+  - Point addition
+  - Point doubling
+  - Scalar multiplication with an arbitrary point
+  - Scalar multiplication with the base point (group generator)
+  - Point decompression from a given x coordinate
+  - Nonce generation via RFC6979 with support for extra data and version
+    information that can be used to prevent nonce reuse between signing
+    algorithms
+
+It also provides an implementation of the Go standard library crypto/elliptic
+Curve interface via the S256 function so that it may be used with other packages
+in the standard library such as crypto/tls, crypto/x509, and crypto/ecdsa.
+However, in the case of ECDSA, it is highly recommended to use the ecdsa sub
+package of this package instead since it is optimized specifically for secp256k1
+and is significantly faster as a result.
+
+Although this package was primarily written for dcrd, it has intentionally been
+designed so it can be used as a standalone package for any projects needing to
+use optimized secp256k1 elliptic curve cryptography.
+
+Finally, a comprehensive suite of tests is provided to provide a high level of
+quality assurance.
+
+# Use of secp256k1 in Decred
+
+At the time of this writing, the primary public key cryptography in widespread
+use on the Decred network used to secure coins is based on elliptic curves
+defined by the secp256k1 domain parameters.
+*/
+package secp256k1